Microsoft Teams Error Code caa20003: How to Fix It
Medium 30-60 minutes High Severity
Verified June 2026
- Error Code
- caa20003
- Brand
- Microsoft Teams
- Product Type
- communication
- Severity
- High
- DIY Difficulty
- Medium
- Estimated Fix Time
- 30-60 minutes
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Tools You'll Need
- Computer with administrator access
- Internet connection
- Valid Microsoft 365 organizational account
How to Fix Error Code caa20003
-
Sign out and clear Teams cache
Back up any important Teams data before clearing cache as this will remove locally stored files and settings. -
Reset Windows credentials
-
Check date and time settings
-
Run Teams as administrator
Running applications as administrator grants elevated permissions. Only do this if other methods fail. -
Reset network settings
Network reset will remove saved WiFi passwords and custom network configurations. -
Reinstall Microsoft Teams
Uninstalling Teams will remove all local data. Ensure important files are backed up to OneDrive or SharePoint before proceeding. -
Check with IT administrator
Parts You May Need
Valid Microsoft 365 license
Check Price on Amazon
Valid Microsoft 365 license
Check Price on Amazon
Valid Microsoft 365 license
Check Price on Amazon
Valid Microsoft 365 license
Check Price on Amazon
Valid Microsoft 365 license
Check Price on Amazon
Valid Microsoft 365 license
Check Price on Amazon
Valid Microsoft 365 license
Check Price on Amazon
Valid Microsoft 365 license
Check Price on Amazon
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When to Call a Professional
Contact your organization's IT support if the error persists after trying all troubleshooting steps, if you don't have administrator access to your computer, or if multiple users in your organization are experiencing the same issue. Professional help is also needed for tenant configuration changes or conditional access policy adjustments.Frequently Asked Questions
What causes Microsoft Teams error code caa20003?
Error code caa20003 is typically caused by authentication failures between your account and your organization's Microsoft 365 tenant. Common causes include corrupted local cache, incorrect system time, network configuration issues, or tenant-level permission problems.
Can I fix Teams error caa20003 without administrator rights?
Some fixes like clearing Teams cache and checking date/time settings can be done without admin rights. However, resetting network settings, managing credentials, and running Teams as administrator require elevated permissions. Contact your IT support if you lack admin access.
Will clearing Teams cache delete my files and conversations?
Clearing local cache removes temporarily stored data but won't delete your chat history, files, or meetings. These are stored on Microsoft's servers. However, you may lose some local settings and need to sign in again.
How long does it take to fix Teams error caa20003?
Most users can resolve this error in 30-60 minutes by following the troubleshooting steps. Simple fixes like cache clearing may work in 5-10 minutes, while reinstalling Teams or network resets may take longer.
Is Teams error caa20003 related to my internet connection?
While not directly an internet connectivity issue, network configuration problems can contribute to authentication failures. Resetting network settings, flushing DNS, and ensuring proper firewall configurations can help resolve the error.