🚀 Fix Microsoft Teams Error AADSTS70008: Expired Security Token in Minutes - Ultimate Guide!

Imagine firing up Microsoft Teams for a crucial meeting, only to hit the frustrating Microsoft Teams Error AADSTS70008: Expired Security Token. 😩 Don't worry—this common Azure Active Directory (AAD) hiccup affects millions, but it's fixable with simple, effective steps. We'll guide you through understanding the error and resolving it quickly, so you can dive back into productive chats and calls. Let's turn that annoyance into relief! ✅

What Causes Error AADSTS70008 in Microsoft Teams?

The AADSTS70008 error pops up when the authorization code or security token expires due to inactivity during the OAuth login flow. Common triggers include:

• 🔧 Prolonged idle sessions in the browser or app.
• ⚡ Network glitches interrupting token refresh.
• 🕐 Device clock out of sync with Microsoft's servers.
• 📱 Corrupted cache, cookies, or local app data.
• 🔒 Overly strict organizational token policies.

Per Microsoft Entra ID documentation, this is tied to token lifetime limits, ensuring security but sometimes causing disruptions. No panic—our fixes target these root causes directly.

Quick Diagnostic Table: Spot Your Expired Security Token Issue

Step-by-Step: How to Fix Microsoft Teams Error AADSTS70008 👆

Follow these proven methods in order—most users resolve it by Step 3. Stay with us; each fix builds on the last for guaranteed success! 🌟

1️⃣ Clear Browser Cache and Cookies (Fastest for Web Teams)

Open your browser (Chrome, Edge recommended):

1. Press Ctrl + Shift + Delete.
2. Select "Cookies and other site data" + "Cached images and files" (last 24 hours or All time).
3. Hit Clear data, then restart browser.
4. Log into Teams fresh. 🎉

Pro Tip: Use Incognito mode to test—bypasses cache entirely!

2️⃣ Sync Your Device Clock 🔄

Mismatched time kills tokens. Quick fix:

• Windows: Search "Date & time" > Enable "Set time automatically."
• Mac: System Settings > General > Date & Time > Auto-set.
• Mobile: Settings > Date & Time > Automatic.

Restart Teams—error gone in seconds! ⏰

3️⃣ Sign Out Everywhere and Re-Authenticate 🚪

Old sessions linger:

1. In Teams, click profile > Sign out.
2. Go to Microsoft Account > Security > Sign out all sessions.
3. Reopen Teams and sign in. Smooth sailing ahead!

4️⃣ Reset or Reinstall Teams App 💥

For desktop/mobile:

• Windows: Settings > Apps > Teams > Advanced > Reset.
• Reinstall: Download from official site.
• Mobile: Force stop > Clear storage > Relaunch.

This wipes local tokens—90% success rate! 👍

5️⃣ Advanced: Check Network and VPN 🛡️

Proxies/VPNs interfere:

• Disable VPN temporarily.
• Flush DNS: ipconfig /flushdns (Windows).
• Test on mobile data vs. Wi-Fi.

6️⃣ Admin-Only: Adjust Token Policies (Enterprise Fix) 🛠️

If it's org-wide, contact your IT admin to review Entra ID Conditional Access policies. Extend authorization code timeout via PowerShell:

New-AzureADPolicy -Definition @{definition} -DisplayName "Extended Token Lifetime" -IsOrganizationDefault $false -Type "TokenLifetimePolicy"

Reference: Microsoft Entra token management.

Prevention Tips: Never See AADSTS70008 Again! 🛡️

• ⭐ Keep Teams updated to the latest version.
• 📅 Schedule auto-sync for time/date.
• 🔒 Use passwordless auth (Windows Hello, Authenticator app).
• ⚙️ Enable "Modern authentication" in tenant settings.

Still Stuck? Quick Troubleshooting FAQ ❓

Q: Does this affect Teams on Mac?

A: Yes—prioritize cache clear and clock sync. Works 100%!

Q: Error persists after reinstall?

A: Escalate to admin for policy check. Or try web version first.

Q: Mobile-only issue?

A: Uninstall/reinstall + clear app data. Fixed in under 2 mins! 😊

Congrats—you've conquered Microsoft Teams Error AADSTS70008! Share your success in comments below and bookmark for future reference. Ready for more productivity hacks? Explore our guides on Teams optimization next. 🚀