How to Fix Microsoft Teams Login Error AADSTS50011

Frustrated by the dreaded Microsoft Teams login error AADSTS50011? 😩 This common Azure Active Directory (AAD) hiccup blocks your sign-in with a message like "The reply URL specified in the request does not match the reply URLs configured for the application." Don't worry – you're not alone, and it's fixable fast!

In this concise guide, we'll pinpoint causes and deliver easy-to-follow steps to get you back collaborating. Follow along, and you'll be online in under 10 minutes. Let's dive in! ✅

Screenshot of Microsoft Teams login error AADSTS50011 displaying reply URL mismatch

⚠️ What Causes Microsoft Teams Login Error AADSTS50011?

The error stems from a reply URL mismatch in Azure AD authentication. Teams tries to redirect after login, but the URL doesn't match your app's registered settings. Common triggers include:

  • Cached credentials or corrupted browser data.
  • Multiple sign-ins across devices.
  • Network issues like VPNs or proxies altering URLs.
  • Outdated Teams app or Azure configurations.
  • Date/time sync problems on your device.

Pro tip: 80% of cases resolve with basic cache clears. Ready to fix? Start here! 👇

🔧 Step-by-Step Fixes for Microsoft Teams Login Error AADSTS50011

1️⃣ Clear Teams Cache (Quickest Fix – 2 Minutes)

Corrupted cache is the #1 culprit. Here's how:

  1. Quit Teams completely (right-click tray icon > Quit).
  2. Press Win + R, type %appdata%\Microsoft\Teams, hit Enter.
  3. Delete all folders inside (e.g., Cache, GPUCache, IndexedDB).
  4. Restart Teams and sign in.

Success rate? Sky-high! 🎉 If not, proceed.

2️⃣ Sign Out from All Devices

Stale sessions cause mismatches:

  1. In Teams (if accessible) or Microsoft Account, go to Security > Sign out everywhere.
  2. Clear browser cache for Edge/Chrome (Teams web uses these).
  3. Try logging in again.

3️⃣ Disable VPN/Proxy & Check Network

VPNs rewrite URLs, triggering AADSTS50011:

  • Turn off VPN/proxy in Windows Settings > Network & Internet.
  • Switch to a stable Wi-Fi (avoid public networks).
  • Flush DNS: Open CMD as admin, run ipconfig /flushdns.
Step-by-step visual guide to clearing Microsoft Teams cache for AADSTS50011 fix

4️⃣ Update or Reinstall Teams

Outdated versions clash with new AAD protocols:

  1. Download latest Teams from official site.
  2. Uninstall old version via Settings > Apps.
  3. Install fresh and sign in.

5️⃣ Verify Device Date/Time & Browser Settings

Issue Fix
Wrong date/time Settings > Time & Language > Sync now
Browser cookies Edge/Chrome: Settings > Privacy > Clear browsing data (cookies/site data)
DoH enabled Disable DNS over HTTPS in browser flags

6️⃣ Advanced: Azure AD Admin Fixes

If you're an admin (or contact one):

  1. Login to Azure Portal.
  2. Go to Entra ID > App registrations > Search "Teams".
  3. Under Authentication, verify/add exact reply URLs like https://teams.microsoft.com/_auth/ or custom ones.
  4. Save and test.

Reference: Official Microsoft Entra error docs.

⭐ Pro Tips to Prevent Teams Login Error AADSTS50011 Recurrence

  • ✅ Use the latest Teams client always.
  • 🔒 Avoid mixing personal/work accounts.
  • 🛡️ Regularly clear cache weekly.
  • 📱 Limit active sessions to 5 devices max.

Still stuck? Run Teams in web mode (teams.microsoft.com) as a bypass.

🎊 You're Back Online!

Congrats – your Microsoft Teams login error AADSTS50011 should be history! 🚀 These steps work for the latest updates, keeping you productive. Share your success in comments below or bookmark for later. Need more Teams tips? Stick around – we've got guides on call drops and chat glitches next! 👏

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