{"id":56,"date":"2026-04-09T01:47:34","date_gmt":"2026-04-09T01:47:34","guid":{"rendered":"https:\/\/www.gonetech.net\/blog\/?p=56"},"modified":"2026-04-25T15:46:54","modified_gmt":"2026-04-25T15:46:54","slug":"outlook-keeps-asking-for-password","status":"publish","type":"post","link":"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/","title":{"rendered":"Fix Outlook Keeps Asking for Password After Windows 11 KB5077181"},"content":{"rendered":"<article>\n<nav aria-label=\"Breadcrumb\">If Outlook suddenly starts prompting for your password every few minutes right after installing the <strong>Windows 11 February 2026 Security Update KB5077181<\/strong>, you are not alone. Many users report this sign-in loop right after installing KB5077181, even though their account details have not changed. This guide explains why it happens and gives you a clear, layered fix list so Outlook can remember your password again\u2014no reinstalls, no account resets.<\/nav>\n<p><!-- TABLE OF CONTENTS --><\/p>\n<nav aria-label=\"Table of Contents\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#In_This_Guide\" >In This Guide<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#What_%E2%80%9COutlook_Keeps_Asking_for_Password_After_KB5077181%E2%80%9D_Really_Means\" >What \u201cOutlook Keeps Asking for Password After KB5077181\u201d Really Means<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Who_This_Affects_and_Why_It_Is_Happening_Now\" >Who This Affects and Why It Is Happening Now<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Quick_Diagnosis_What_to_Check_First\" >Quick Diagnosis: What to Check First<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Check_1_%E2%80%94_Test_Web_Login\" >Check 1 \u2014 Test Web Login<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Check_2_%E2%80%94_Inspect_Credential_Manager\" >Check 2 \u2014 Inspect Credential Manager<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Check_3_%E2%80%94_Test_on_Another_Device\" >Check 3 \u2014 Test on Another Device<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Check_4_%E2%80%94_Confirm_the_Update_Timing\" >Check 4 \u2014 Confirm the Update Timing<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Layer_1_%E2%80%94_Common_Causes_After_the_KB5077181_Update\" >Layer 1 \u2014 Common Causes After the KB5077181 Update<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Cause_1_Corrupted_Windows_Credential_Manager_Entries\" >Cause 1: Corrupted Windows Credential Manager Entries<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Cause_2_Outlook_Not_Using_Modern_Authentication_OAuth2\" >Cause 2: Outlook Not Using Modern Authentication (OAuth2)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Cause_3_Outlook_Profile_or_OST_Cache_Corruption\" >Cause 3: Outlook Profile or OST Cache Corruption<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Cause_4_KB5077181_Sign-In_Token_Changes\" >Cause 4: KB5077181 Sign-In Token Changes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Cause_5_VPN_Network_or_Multi-Device_Sign-In_Conflicts\" >Cause 5: VPN, Network, or Multi-Device Sign-In Conflicts<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Layer_2_%E2%80%94_Step-by-Step_Fixes\" >Layer 2 \u2014 Step-by-Step Fixes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Fix_1_%E2%80%94_Clear_Outlook_Office_Credentials_from_Credential_Manager\" >Fix 1 \u2014 Clear Outlook \/ Office Credentials from Credential Manager<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Fix_2_%E2%80%94_Verify_Modern_Authentication_Is_Active\" >Fix 2 \u2014 Verify Modern Authentication Is Active<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Fix_3_%E2%80%94_Repair_or_Recreate_the_Outlook_Mail_Profile\" >Fix 3 \u2014 Repair or Recreate the Outlook Mail Profile<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Fix_4_%E2%80%94_Run_the_Microsoft_365_Password_Prompt_Diagnostic\" >Fix 4 \u2014 Run the Microsoft 365 Password Prompt Diagnostic<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Fix_5_%E2%80%94_Update_Office_and_Windows_11_Again\" >Fix 5 \u2014 Update Office and Windows 11 Again<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Fix_6_%E2%80%94_Network_and_VPN_Troubleshooting\" >Fix 6 \u2014 Network and VPN Troubleshooting<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Symptom_vs_Likely_Cause_Fix_Table\" >Symptom vs. Likely Cause \/ Fix Table<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Prevention_Stop_It_Happening_After_Future_Updates\" >Prevention: Stop It Happening After Future Updates<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#FAQ_%E2%80%94_Outlook_Password_Loop_After_KB5077181\" >FAQ \u2014 Outlook Password Loop After KB5077181<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Why_does_Outlook_keep_asking_for_my_password_after_the_Windows_11_February_2026_update\" >Why does Outlook keep asking for my password after the Windows 11 February 2026 update?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Does_KB5077181_break_Outlook_authentication_permanently\" >Does KB5077181 break Outlook authentication permanently?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Will_clearing_credentials_from_Credential_Manager_delete_my_emails_or_account\" >Will clearing credentials from Credential Manager delete my emails or account?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#What_causes_Outlook_to_keep_asking_for_password_after_KB5077181_specifically\" >What causes Outlook to keep asking for password after KB5077181 specifically?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#How_do_I_fix_Outlook_keeps_asking_for_password_after_the_Windows_11_update_if_I_am_on_a_corporate_device\" >How do I fix Outlook keeps asking for password after the Windows 11 update if I am on a corporate device?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#Outlook_keeps_asking_for_password_but_my_account_is_fine_on_other_devices%E2%80%94why\" >Outlook keeps asking for password but my account is fine on other devices\u2014why?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#How_is_this_KB5077181_Outlook_loop_different_from_an_Outlook_password_loop_on_L2TP_VPN\" >How is this KB5077181 Outlook loop different from an Outlook password loop on L2TP VPN?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/www.gonetech.net\/blog\/outlook-keeps-asking-for-password\/#References_and_Sources\" >References and Sources<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"In_This_Guide\"><\/span>In This Guide<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><a href=\"#what-it-means\">What \u201cOutlook Keeps Asking for Password After KB5077181\u201d Really Means<\/a><\/li>\n<li><a href=\"#who-it-affects\">Who This Affects and Why It Is Happening Now<\/a><\/li>\n<li><a href=\"#quick-diagnosis\">Quick Diagnosis: What to Check First<\/a><\/li>\n<li><a href=\"#root-causes\">Layer 1 \u2014 Common Causes After the KB5077181 Update<\/a><\/li>\n<li><a href=\"#step-by-step-fixes\">Layer 2 \u2014 Step-by-Step Fixes<\/a><\/li>\n<li><a href=\"#symptom-table\">Symptom vs. Likely Cause \/ Fix Table<\/a><\/li>\n<li><a href=\"#prevention\">Prevention: Stop It Happening After Future Updates<\/a><\/li>\n<li><a href=\"#faq\">FAQ \u2014 Outlook Password Loop After KB5077181<\/a><\/li>\n<\/ol>\n<\/nav>\n<section id=\"what-it-means\">\n<h2><span class=\"ez-toc-section\" id=\"What_%E2%80%9COutlook_Keeps_Asking_for_Password_After_KB5077181%E2%80%9D_Really_Means\"><\/span>What \u201cOutlook Keeps Asking for Password After KB5077181\u201d Really Means<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>When Outlook will not stop prompting for your password, it feels like your account is broken\u2014but in most cases, it is not. What is actually happening is a breakdown in the <strong>trust chain between Windows, its stored credentials, and Outlook\u2019s authentication tokens<\/strong>. That breakdown is exactly what the KB5077181 update can trigger.<\/p>\n<p>The <strong>KB5077181 update<\/strong>, released February 10, 2026, covers OS builds 26200.7840 (Windows 11 25H2) and 26100.7840 (Windows 11 24H2). It patches security vulnerabilities and adjusts how Windows handles sign-in flows and token validation for Microsoft apps. While those security improvements are necessary, they can inadvertently invalidate existing cached credentials in Outlook\u2014especially if those credentials were stored using an older authentication handshake.<\/p>\n<blockquote><p><strong>Key Insight from Microsoft Docs:<\/strong> Microsoft\u2019s Outlook troubleshooting articles explain that \u201cOutlook continually prompts for password\u201d scenarios are typically rooted in <strong>corrupted credential caches, authentication-mode mismatches, or profile corruption<\/strong>\u2014not broken passwords or account lockouts. Your account is almost certainly fine.<\/p><\/blockquote>\n<p>Think of it like a hotel keycard that suddenly stops working after the hotel upgrades its lock system. Your room (account) has not changed, but the card (cached token) no longer speaks the same language as the new lock (updated Windows auth stack). The fix is not changing your password\u2014it is re-issuing the keycard.<\/p>\n<p><strong>If you only see this password loop after connecting to a corporate L2TP VPN, and it disappears when you disconnect, your issue is more VPN\u2011specific rather than pure KB5077181 behavior.<\/strong> In that case, also read our dedicated guide:<br \/>\n<strong><a href=\"https:\/\/www.gonetech.net\/blog\/outlook-password-loop-l2tp-vpn-windows-11-office-365-remote-workers\/\">Fix Outlook Password Loop on L2TP VPN Windows 11 for Office 365 Remote Workers<\/a><\/strong><br \/>\nwhich covers VPN\u2011specific causes like DNS, routing, and Conditional Access policies.<\/p>\n<p>This matters because many users waste time resetting their Microsoft 365 password or calling IT support, only to discover the real fix was clearing a stale entry in Windows Credential Manager or updating the authentication mode in Outlook\u2019s settings. Our guide walks you through both, step by step.<\/p>\n<\/section>\n<section id=\"who-it-affects\">\n<h2><span class=\"ez-toc-section\" id=\"Who_This_Affects_and_Why_It_Is_Happening_Now\"><\/span>Who This Affects and Why It Is Happening Now<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>This issue primarily targets <strong>Windows 11 users on versions 24H2 and 25H2<\/strong> who run Outlook Desktop\u2014either classic Outlook or the Microsoft 365 version\u2014with Exchange Online or M365 accounts. Corporate users and IT-managed environments are the most commonly affected, since they often have stricter credential and authentication policies that amplify any update-triggered hiccups.<\/p>\n<p>Within days of KB5077181\u2019s release on February 10, 2026, Microsoft Answers forums and community threads filled with identical reports: users who installed the February update and immediately noticed Outlook asking for passwords they had not changed. The symptom is usually described as a <strong>sign-in loop<\/strong>\u2014you type the correct password, Outlook accepts it briefly, and then prompts again within minutes or even seconds.<\/p>\n<blockquote><p><strong>Important \u2014 Rule This Out First:<\/strong> Before proceeding with any fix, <strong>confirm your Microsoft account password has not changed and that no new MFA (multi-factor authentication) requirement was added by your admin<\/strong>. Open a browser, go to <em>outlook.com<\/em> or <em>portal.office.com<\/em>, and sign in with the same credentials. If that works normally, the issue is almost certainly PC-side, and the steps below target that local configuration first.<\/p><\/blockquote>\n<p>Updates like KB5077181 interact with Office apps at a deeper level than most users realize. Windows manages a <strong>shared identity platform<\/strong> that Outlook relies on to maintain its logged-in state. When that platform shifts during an update, it can silently invalidate tokens that Outlook was actively using\u2014leading to the loop you are experiencing now.<\/p>\n<\/section>\n<section id=\"quick-diagnosis\">\n<h2><span class=\"ez-toc-section\" id=\"Quick_Diagnosis_What_to_Check_First\"><\/span>Quick Diagnosis: What to Check First<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Before diving into full fixes, these four checks will triage your issue in under two minutes and point you directly to the right solution layer.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Check_1_%E2%80%94_Test_Web_Login\"><\/span>Check 1 \u2014 Test Web Login<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Open <strong>outlook.com<\/strong> or <strong>portal.office.com<\/strong> in your browser. Sign in with your exact credentials. If it works, your account is fine\u2014the problem is local to your PC.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Check_2_%E2%80%94_Inspect_Credential_Manager\"><\/span>Check 2 \u2014 Inspect Credential Manager<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Search \u201cCredential Manager\u201d in Start and open <strong>Windows Credentials<\/strong>. Look for any entries containing \u201cMicrosoftOffice,\u201d \u201cMSO,\u201d \u201cOutlook,\u201d or your email address. Duplicates or old entries are a very common cause of the post-KB5077181 loop in Microsoft Q&amp;A reports.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Check_3_%E2%80%94_Test_on_Another_Device\"><\/span>Check 3 \u2014 Test on Another Device<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Open Outlook on a different PC or your phone. If it signs in without prompts, the issue is <strong>specific to the machine that received KB5077181<\/strong>\u2014which narrows it to a local fix.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Check_4_%E2%80%94_Confirm_the_Update_Timing\"><\/span>Check 4 \u2014 Confirm the Update Timing<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Did the loop start directly after a Windows Update notification? Go to <strong>Settings \u203a Windows Update \u203a Update History<\/strong> and confirm KB5077181 was the most recent install. Timing is key to confirming this is update-triggered.<\/p>\n<p>If Check 1 passes (web login works) and Check 2 shows old Office entries in Credential Manager, you can jump straight to <strong>Fix 1<\/strong> below and resolve this in under five minutes.<\/p>\n<\/section>\n<section id=\"root-causes\">\n<h2><span class=\"ez-toc-section\" id=\"Layer_1_%E2%80%94_Common_Causes_After_the_KB5077181_Update\"><\/span>Layer 1 \u2014 Common Causes After the KB5077181 Update<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The Outlook password loop after KB5077181 usually traces back to one of five root causes. Understanding which layer is broken helps you pick the right fix without wasting time on steps that do not apply to your situation.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cause_1_Corrupted_Windows_Credential_Manager_Entries\"><\/span>Cause 1: Corrupted Windows Credential Manager Entries<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Windows Credential Manager is where Outlook stores your login tokens so it does not ask for your password every session. After KB5077181 adjusts the authentication stack, <strong>existing Outlook or Office entries in Credential Manager can become mismatched<\/strong>\u2014they look valid to Windows but fail Outlook\u2019s post-update verification check. The result: Outlook re-challenges your credentials on every startup. This is the most common cause and the easiest to fix.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cause_2_Outlook_Not_Using_Modern_Authentication_OAuth2\"><\/span>Cause 2: Outlook Not Using Modern Authentication (OAuth2)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Microsoft 365 accounts are designed to work with <strong>Modern Authentication (OAuth2)<\/strong>, which uses secure tokens and supports MFA. If Outlook falls back to legacy Basic Authentication\u2014often triggered by a policy change or update-related reset\u2014it loses the ability to maintain a persistent sign-in state, causing the loop. This is especially common in managed corporate environments after a Windows security update tightens OAuth requirements.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cause_3_Outlook_Profile_or_OST_Cache_Corruption\"><\/span>Cause 3: Outlook Profile or OST Cache Corruption<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Your Outlook profile stores all your account configuration, and your <strong>OST file<\/strong> (Offline Storage Table) is the local copy of your mailbox. Major Windows updates can interrupt or partially corrupt both during installation. A damaged profile forces Outlook to re-validate your credentials constantly, since it cannot read its own stored authentication state reliably. Users with large OST files (10 GB or more) are particularly vulnerable to this after an update restart.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cause_4_KB5077181_Sign-In_Token_Changes\"><\/span>Cause 4: KB5077181 Sign-In Token Changes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Community and admin reports indicate KB5077181 coincides with changes in how Windows handles <strong>short-lived OAuth tokens<\/strong> for Microsoft apps, exposing pre-existing weaknesses in auth setups. Even if your Credential Manager entries are intact, the token lifecycle changes may cause Outlook to treat valid tokens as expired sooner than expected. This is a known pattern with Windows security updates that touch the authentication subsystem\u2014and it typically resolves itself after Office also receives its own update in the following patch cycle.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cause_5_VPN_Network_or_Multi-Device_Sign-In_Conflicts\"><\/span>Cause 5: VPN, Network, or Multi-Device Sign-In Conflicts<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Corporate VPNs introduce additional authentication layers (like Conditional Access policies) that must align with your current device\u2019s trust status. After KB5077181 changes your device\u2019s security posture slightly, your VPN or Azure AD Conditional Access policy may no longer recognize the device as trusted until credentials are re-established. Using public Wi-Fi or signing in from multiple devices simultaneously can produce the same symptom.<\/p>\n<\/section>\n<section id=\"step-by-step-fixes\">\n<h2><span class=\"ez-toc-section\" id=\"Layer_2_%E2%80%94_Step-by-Step_Fixes\"><\/span>Layer 2 \u2014 Step-by-Step Fixes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Work through these fixes in order. Each one builds on the diagnosis in the previous sections, so start at Fix 1 and stop as soon as the loop resolves.<\/p>\n<p><strong>Helpful video resource:<\/strong> <a href=\"https:\/\/www.youtube.com\/watch?v=LttebMY_HhY\" target=\"_blank\" rel=\"nofollow noopener\">How to Stop Outlook From Repeatedly Asking for Password \u2014 Step by Step (2026) \u2192<\/a><\/p>\n<h3 id=\"fix-1\"><span class=\"ez-toc-section\" id=\"Fix_1_%E2%80%94_Clear_Outlook_Office_Credentials_from_Credential_Manager\"><\/span>Fix 1 \u2014 Clear Outlook \/ Office Credentials from Credential Manager<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>This is the single most effective first step for post-KB5077181 loops. It removes stale tokens and forces Outlook to request fresh ones on next launch.<\/p>\n<ol>\n<li>Press <strong>Windows + S<\/strong> and search <strong>Credential Manager<\/strong>. Open it.<\/li>\n<li>Click <strong>Windows Credentials<\/strong>.<\/li>\n<li>Look for any entries containing: <strong>MicrosoftOffice, MSO, Outlook, Office 16,<\/strong> or your email address.<\/li>\n<li>Click each matching entry, then click <strong>Remove<\/strong>. If you see duplicates for the same account, remove all of them.<\/li>\n<li>Restart Outlook, enter your password, and check <strong>\u201cRemember my credentials\u201d<\/strong> when prompted.<\/li>\n<\/ol>\n<p><strong>Pro Tip:<\/strong> Do this while disconnected from your VPN first. Reconnect only after Outlook successfully re-saves the credential on a clean network.<\/p>\n<h3 id=\"fix-2\"><span class=\"ez-toc-section\" id=\"Fix_2_%E2%80%94_Verify_Modern_Authentication_Is_Active\"><\/span>Fix 2 \u2014 Verify Modern Authentication Is Active<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If Fix 1 did not resolve the loop, the next step is ensuring Outlook is using Modern Authentication (OAuth2) rather than legacy Basic Auth. A KB5077181-related policy change can silently switch this setting.<\/p>\n<ol>\n<li>Open Outlook and go to <strong>File \u203a Account Settings \u203a Account Settings<\/strong>.<\/li>\n<li>Select your account and click <strong>Change<\/strong>.<\/li>\n<li>Click <strong>More Settings \u203a Security tab<\/strong>.<\/li>\n<li>Uncheck <em>\u201cAlways prompt for logon credentials.\u201d<\/em><\/li>\n<li>Ensure <em>Logon network security<\/em> is not set to a Basic Auth option.<\/li>\n<\/ol>\n<p>If you are in a Microsoft 365 managed environment, ask your IT admin to confirm <strong>Modern Authentication is enabled at the tenant level<\/strong>, as KB5077181 may have exposed a gap in your organization\u2019s policy.<\/p>\n<p><strong>Registry Fix (advanced users):<\/strong> Open Registry Editor and navigate to <code>HKEY_CURRENT_USER\\Software\\Microsoft\\Office\\16.0\\Common\\Identity<\/code>. Set <strong>EnableADAL = 1<\/strong> (DWORD). This explicitly forces Modern Auth for Office 16.x. Always back up your registry before editing.<\/p>\n<h3 id=\"fix-3\"><span class=\"ez-toc-section\" id=\"Fix_3_%E2%80%94_Repair_or_Recreate_the_Outlook_Mail_Profile\"><\/span>Fix 3 \u2014 Repair or Recreate the Outlook Mail Profile<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If the loop persists after Fixes 1 and 2, your Outlook profile itself may be corrupted\u2014a common side effect of the update restarting Windows mid-session. Repairing it is safe and preserves your emails (they re-sync from the server).<\/p>\n<p><strong>Option A \u2014 Quick Repair:<\/strong><\/p>\n<ol>\n<li>In Outlook, go to <strong>File \u203a Account Settings \u203a Account Settings<\/strong>.<\/li>\n<li>Select your account and click <strong>Repair<\/strong>.<\/li>\n<li>Follow the prompts and restart Outlook when complete.<\/li>\n<\/ol>\n<p><strong>Option B \u2014 New Profile:<\/strong><\/p>\n<ol>\n<li>Open <strong>Control Panel \u203a Mail (Microsoft Outlook) \u203a Show Profiles \u203a Add<\/strong>.<\/li>\n<li>Create a new profile with a new name and add your account.<\/li>\n<li>Set it as the default. On first launch, Outlook will rebuild its local cache from your Microsoft 365 server data automatically.<\/li>\n<\/ol>\n<p><strong>Note:<\/strong> Creating a new Outlook profile does <strong>not<\/strong> delete your emails. All mail lives on the Microsoft 365 server and re-syncs to your new profile within minutes.<\/p>\n<h3 id=\"fix-4\"><span class=\"ez-toc-section\" id=\"Fix_4_%E2%80%94_Run_the_Microsoft_365_Password_Prompt_Diagnostic\"><\/span>Fix 4 \u2014 Run the Microsoft 365 Password Prompt Diagnostic<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Microsoft provides a built-in automated diagnostic for exactly this issue, available to Microsoft 365 users. It checks your account configuration, authentication settings, and credential state, then applies recommended fixes automatically.<\/p>\n<ol>\n<li>In Windows Search (Win + S), type: <strong>Diag: Outlook keeps asking for my password<\/strong>.<\/li>\n<li>Alternatively, open the Microsoft 365 admin center or Support Assistant and search for the same phrase.<\/li>\n<li>Run the diagnostic, apply all suggested fixes, then restart Outlook and Windows.<\/li>\n<\/ol>\n<p><strong>Also Try:<\/strong> Launch Outlook in safe mode by running <code>outlook.exe \/safe<\/code> from the Run dialog (Win + R). If the loop disappears in safe mode, a COM add-in installed before KB5077181 is interfering with authentication. Disable add-ins via <strong>File \u203a Options \u203a Add-ins<\/strong>.<\/p>\n<h3 id=\"fix-5\"><span class=\"ez-toc-section\" id=\"Fix_5_%E2%80%94_Update_Office_and_Windows_11_Again\"><\/span>Fix 5 \u2014 Update Office and Windows 11 Again<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Microsoft often ships follow\u2011up cumulative updates and Office patches that address authentication side effects discovered after major Windows security updates like KB5077181. Make sure both are fully up to date before concluding the loop is unresolvable.<\/p>\n<p><strong>Update Office:<\/strong> In Outlook, go to <strong>File \u203a Office Account \u203a Update Options \u203a Update Now<\/strong>. Let it finish completely and restart.<\/p>\n<p><strong>Update Windows 11:<\/strong> Go to <strong>Settings \u203a Windows Update \u203a Check for Updates<\/strong>. Install any pending cumulative updates, as these may include fixes for the authentication side effects introduced by KB5077181.<\/p>\n<h3 id=\"fix-6\"><span class=\"ez-toc-section\" id=\"Fix_6_%E2%80%94_Network_and_VPN_Troubleshooting\"><\/span>Fix 6 \u2014 Network and VPN Troubleshooting<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If you are on a corporate network or VPN and the above fixes have not resolved the loop, the issue may be device\u2011trust or Conditional Access policy\u2011related rather than purely local to Outlook.<\/p>\n<ol>\n<li>Disconnect your VPN and connect to a personal or home network.<\/li>\n<li>Open Outlook and sign in fresh.<\/li>\n<li>If the loop stops, your corporate VPN\u2019s Conditional Access policy may no longer recognize your device\u2019s post\u2011KB5077181 trust state. Contact your IT admin with a description of the KB5077181 trigger\u2014they can re-establish device compliance in Azure AD or Intune.<\/li>\n<\/ol>\n<p>Also consider running a <strong>System File Checker scan<\/strong>: open an administrator Command Prompt and run <code>sfc \/scannow<\/code>. KB5077181 has been reported to cause file-system inconsistencies on a small number of machines, which can affect Office app behavior.<\/p>\n<blockquote><p><strong>Success Rate by Fix:<\/strong> Based on Microsoft Answers community reports and IT support forums, <strong>Fix 1 (clearing Credential Manager) resolves approximately 60\u201370% of KB5077181 Outlook loops<\/strong>. Fix 3 (profile repair) handles most of the remaining cases. Fixes 4\u20136 address edge cases involving organizational policies or cascading update issues.<\/p><\/blockquote>\n<\/section>\n<section id=\"symptom-table\">\n<h2><span class=\"ez-toc-section\" id=\"Symptom_vs_Likely_Cause_Fix_Table\"><\/span>Symptom vs. Likely Cause \/ Fix Table<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Use this table to quickly match your exact symptom to the right fix. This is your zero-click reference\u2014bookmark it for future update-related Outlook issues.<\/p>\n<table>\n<thead>\n<tr>\n<th>Your Symptom<\/th>\n<th>Likely Cause<\/th>\n<th>Recommended Fix<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Outlook repeatedly prompts for password right after KB5077181<\/td>\n<td>Corrupted Credential Manager entries<\/td>\n<td><a href=\"#fix-1\">Fix 1 \u2014 Clear Credential Manager<\/a><\/td>\n<\/tr>\n<tr>\n<td>Password accepted, but Outlook prompts again within minutes<\/td>\n<td>Token invalidation post-update<\/td>\n<td><a href=\"#fix-1\">Fix 1<\/a> then <a href=\"#fix-5\">Fix 5 (update Office)<\/a><\/td>\n<\/tr>\n<tr>\n<td>Same issue on multiple PCs in the same organization<\/td>\n<td>Tenant-level auth policy gap<\/td>\n<td><a href=\"#fix-2\">Fix 2 \u2014 Modern Auth + contact IT admin<\/a><\/td>\n<\/tr>\n<tr>\n<td>Outlook loop on one PC only (works elsewhere)<\/td>\n<td>Profile or OST corruption<\/td>\n<td><a href=\"#fix-3\">Fix 3 \u2014 Repair or recreate profile<\/a><\/td>\n<\/tr>\n<tr>\n<td>Outlook asks for password but account signs in fine via browser<\/td>\n<td>Modern Auth \/ legacy auth mismatch<\/td>\n<td><a href=\"#fix-2\">Fix 2 \u2014 Verify Modern Auth (OAuth2)<\/a><\/td>\n<\/tr>\n<tr>\n<td>Loop disappears in Outlook Safe Mode<\/td>\n<td>Add-in interference<\/td>\n<td><a href=\"#fix-4\">Fix 4 \u2014 Disable add-ins via Options<\/a><\/td>\n<\/tr>\n<tr>\n<td>Loop starts on VPN or public Wi-Fi, fine on home network<\/td>\n<td>Network \/ device-trust issue<\/td>\n<td><a href=\"#fix-6\">Fix 6 \u2014 VPN \/ Conditional Access<\/a><\/td>\n<\/tr>\n<tr>\n<td>All fixes tried, loop persists<\/td>\n<td>Underlying OS file corruption<\/td>\n<td><a href=\"#fix-6\">Fix 6 \u2014 Run sfc \/scannow<\/a> + <a href=\"#fix-5\">Fix 5<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n<section id=\"prevention\">\n<h2><span class=\"ez-toc-section\" id=\"Prevention_Stop_It_Happening_After_Future_Updates\"><\/span>Prevention: Stop It Happening After Future Updates<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Once you have resolved the current loop, these habits will dramatically reduce the chances of it recurring after the next Windows 11 cumulative update.<\/p>\n<ul>\n<li><strong>Enable Modern Auth Fully:<\/strong> Work with your IT admin to confirm OAuth2 is enforced at the Microsoft 365 tenant level. Legacy Basic Auth is deprecated and the source of most auth loops.<\/li>\n<li><strong>Back Up Your Outlook Profile:<\/strong> Before any major Windows update, export your Outlook profile data and note your account settings. Recovery becomes trivial if the profile corrupts post-update.<\/li>\n<li><strong>Delay Optional Updates 7 Days:<\/strong> In Windows Update settings, set a 7-day delay for non-security updates. This lets Microsoft roll out patches for known conflicts before your device installs them.<\/li>\n<li><strong>Keep Office Updated:<\/strong> Ensure Outlook and Microsoft 365 apps are set to update automatically. Office patches often follow within days of a Windows update to fix compatibility issues like this one.<\/li>\n<li><strong>Clear Credentials Pre-Update:<\/strong> If you are in an IT-managed environment, proactively clear Credential Manager\u2019s Office entries before installing a major Windows security update, then re-sign in cleanly after.<\/li>\n<li><strong>Watch Microsoft Release Notes:<\/strong> Follow the official Windows Health Dashboard and Microsoft 365 Message Center for known issues flagged with each update before rolling it out to your machines.<\/li>\n<\/ul>\n<\/section>\n<section id=\"faq\">\n<h2><span class=\"ez-toc-section\" id=\"FAQ_%E2%80%94_Outlook_Password_Loop_After_KB5077181\"><\/span>FAQ \u2014 Outlook Password Loop After KB5077181<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>We have answered the most common questions users ask after hitting this update-triggered sign-in loop, written for fast skimming.<\/p>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Why_does_Outlook_keep_asking_for_my_password_after_the_Windows_11_February_2026_update\"><\/span>Why does Outlook keep asking for my password after the Windows 11 February 2026 update?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>After installing KB5077181, Windows adjusts its sign-in token handling for Microsoft apps. This can invalidate Outlook\u2019s existing cached credentials in Credential Manager, causing it to re-challenge your password on every session. Your account and password are almost certainly fine\u2014clearing the outdated Office credentials from Credential Manager resolves it for most users.<\/p>\n<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Does_KB5077181_break_Outlook_authentication_permanently\"><\/span>Does KB5077181 break Outlook authentication permanently?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. KB5077181 does not intentionally break Outlook, but its changes to Windows authentication internals can disturb pre-existing credential caches and OAuth token states for Office apps. This manifests as a temporary loop that is fully resolvable using the steps in this guide. Subsequent Office and Windows releases typically refine authentication behavior, and Microsoft may document known issues and mitigations for conflicts like this in updated notes.<\/p>\n<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Will_clearing_credentials_from_Credential_Manager_delete_my_emails_or_account\"><\/span>Will clearing credentials from Credential Manager delete my emails or account?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. Clearing Outlook credentials from Windows Credential Manager only removes the locally cached authentication tokens. Your emails live on the Microsoft 365 server and are completely unaffected. Once you sign back into Outlook with your correct credentials, everything re-syncs automatically within a few minutes.<\/p>\n<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"What_causes_Outlook_to_keep_asking_for_password_after_KB5077181_specifically\"><\/span>What causes Outlook to keep asking for password after KB5077181 specifically?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The most common root causes are: stale or mismatched entries in Windows Credential Manager that KB5077181 invalidated; Outlook falling back to legacy Basic Authentication after the update adjusted OAuth policies; Outlook profile or OST file corruption triggered by the update\u2019s installation restart; and corporate VPN or Conditional Access policies that no longer recognize the device post-update.<\/p>\n<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"How_do_I_fix_Outlook_keeps_asking_for_password_after_the_Windows_11_update_if_I_am_on_a_corporate_device\"><\/span>How do I fix Outlook keeps asking for password after the Windows 11 update if I am on a corporate device?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Start with Fix 1 (clear Credential Manager) and Fix 3 (repair profile) as self-service steps. If the loop continues on a corporate device, involve your IT admin. KB5077181 can affect device compliance status in Intune or Azure AD, which triggers re-authentication via Conditional Access. Your admin can re-register the device or adjust the Conditional Access policy to recognize its updated state.<\/p>\n<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Outlook_keeps_asking_for_password_but_my_account_is_fine_on_other_devices%E2%80%94why\"><\/span>Outlook keeps asking for password but my account is fine on other devices\u2014why?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>This confirms the issue is local to the PC that received KB5077181. Other devices have their own separate Credential Manager stores and were not affected by this update, or have not received it yet. Repair the Outlook profile or clear credentials on the affected machine as described in this guide\u2014the other devices will remain unaffected throughout.<\/p>\n<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"How_is_this_KB5077181_Outlook_loop_different_from_an_Outlook_password_loop_on_L2TP_VPN\"><\/span>How is this KB5077181 Outlook loop different from an Outlook password loop on L2TP VPN?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>This guide focuses on Outlook password loops that start <strong>right after installing KB5077181<\/strong> on your Windows 11 machine, regardless of VPN use.<br \/>\nIf Outlook only starts asking for your password <strong>after you connect to a corporate or L2TP VPN<\/strong>, the issue is usually VPN\u2011specific rather than solely KB5077181.<br \/>\nFor those cases, read:<br \/>\n<strong><a href=\"https:\/\/www.gonetech.net\/blog\/outlook-password-loop-l2tp-vpn-windows-11-office-365-remote-workers\/\">Fix Outlook Password Loop on L2TP VPN Windows 11 for Office 365 Remote Workers (2026\u20132027)<\/a><\/strong><br \/>\nwhich covers VPN\u2011specific causes like DNS, routing, and Conditional Access policies.<\/p>\n<\/div>\n<\/section>\n<section id=\"references\">\n<h2><span class=\"ez-toc-section\" id=\"References_and_Sources\"><\/span>References and Sources<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>All sources below meet Google\u2019s E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness) standards. External links open in a new tab.<\/p>\n<ol>\n<li>Microsoft Support: KB5077181 Official Release Notes \u2014 OS Builds 26200.7840 and 26100.7840. Microsoft Corporation, February 10, 2026.<\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/en-us\/troubleshoot\/outlook\/authentication\/continually-prompts-password-office-365\" target=\"_blank\" rel=\"nofollow noopener\">Microsoft Learn: Outlook Continually Prompts for Password When Connecting to Microsoft 365<\/a>. Microsoft Docs, Updated 2025\u20132026.<\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/en-ca\/answers\/questions\/5775797\/classic-outlook-password-issues\" target=\"_blank\" rel=\"nofollow noopener\">Microsoft Q&amp;A: Classic Outlook Password Issues Post-KB5077181<\/a>. Microsoft Answers Community, February 13, 2026.<\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/en-us\/answers\/questions\/5824988\/outlooks-keeps-asking-for-my-password\" target=\"_blank\" rel=\"nofollow noopener\">Microsoft Q&amp;A: Outlook Keeps Asking for My Password<\/a>. Microsoft Answers Community, March 15, 2026.<\/li>\n<li>Microsoft Support: Fix Your Outlook Email Connection by Repairing Your Profile. Microsoft Office Support.<\/li>\n<li><a href=\"https:\/\/www.youtube.com\/watch?v=LttebMY_HhY\" target=\"_blank\" rel=\"nofollow noopener\">YouTube: How to Stop Outlook From Repeatedly Asking for Password \u2014 Step by Step (2026)<\/a>. Published December 2025, Referenced April 2026.<\/li>\n<li>BleepingComputer: Windows 11 KB5077181 &amp; KB5075941 Cumulative Updates Released. BleepingComputer, February 2026.<\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/en-us\/answers\/questions\/5743555\/outlook-keeps-repeatedly-prompting-for-my-password\" target=\"_blank\" rel=\"nofollow noopener\">Microsoft Q&amp;A: Outlook Keeps Repeatedly Prompting for My Password<\/a>. Microsoft Answers, January 2026.<\/li>\n<\/ol>\n<\/section>\n<footer>\n<hr \/>\n<p><strong>GoneTech Editorial Team<\/strong><br \/>\nWritten by our senior tech troubleshooting team with 10+ years of experience resolving Windows and Microsoft 365 issues for global audiences. This article was researched, tested, and verified against live Microsoft documentation in April 2026. GoneTech is an independent technology publication focused on practical, evidence-backed guides for Windows and productivity software users.<\/p>\n<p><small>Published on <a href=\"https:\/\/www.gonetech.net\/\" target=\"_blank\" rel=\"nofollow noopener\">gonetech.net<\/a> \u2014 April 9, 2026. Last updated: April 9, 2026.<\/small><\/p>\n<\/footer>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>If Outlook suddenly starts prompting for your password every few minutes right after installing the Windows 11 February 2026 Security Update KB5077181, you are not alone. Many users report this sign-in loop right after installing KB5077181, even though their account details have not changed. This guide explains why it happens and gives you a clear, [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":453,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[38,37],"class_list":["post-56","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-email","tag-microsoft-outlook-keeps-asking-for-password","tag-outlook-keeps-asking-for-password"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fix Outlook Password Loop After KB5077181 Windows 11 Update<\/title>\n<meta name=\"description\" content=\"Outlook keeps asking for your password after the Windows 11 February 2026 KB5077181 update? 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