Microsoft Teams Error Code CAA70004: How to Fix It

Easy 10-15 minutes Medium Severity Verified June 2026
Summarize with ChatGPTSummarize with ClaudeSummarize with Perplexity Add as Preferred Source on Google
Error Code
caa70004
Brand
Microsoft Teams
Product Type
communication
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
10-15 minutes
Microsoft Teams error code CAA70004 is a sign-in authentication error that prevents users from accessing the platform. This error typically occurs when cached credentials become corrupted or outdated, blocking the normal authentication process. The good news is that this issue can usually be resolved by clearing the Teams cache and resetting stored credentials.
Ad

Tools You'll Need

How to Fix Error Code caa70004

  1. Close Microsoft Teams completely

    Ensure you save any ongoing work or conversations before closing Teams, as unsent messages may be lost.

  2. Clear Teams cache files

  3. Clear Windows Credential Manager (Windows only)

  4. Reset Teams settings registry (Windows only)

    Be careful when editing the registry. Only delete the specified Teams key to avoid system issues.

  5. Clear browser cookies and cache

  6. Restart your computer

  7. Launch Teams and sign in

  8. Update Teams if the error persists

Ad

When to Call a Professional

Contact your IT administrator or Microsoft support if the error persists after clearing cache and credentials, especially in corporate environments where advanced authentication policies or conditional access rules may be causing the issue. If you're experiencing this error across multiple Microsoft 365 applications, there may be a broader account or tenant-level issue that requires professional assistance.

Frequently Asked Questions

What causes Microsoft Teams error code CAA70004?
Error CAA70004 is typically caused by corrupted cached credentials, outdated authentication tokens, or conflicts in stored login data. It can also occur after password changes, account updates, or when switching between different Microsoft accounts.
Will clearing Teams cache delete my chat history?
No, clearing the local Teams cache will not delete your chat history, files, or meeting recordings. This data is stored on Microsoft's servers. However, you may need to wait for Teams to re-sync your recent conversations and files after clearing the cache.
Can I fix CAA70004 without administrator access?
Most cache clearing steps can be performed without administrator access. However, editing the Windows registry and accessing Credential Manager may require administrator privileges on corporate devices. Try clearing the Teams cache folder and browser data first, as these steps often resolve the issue.
Why does Teams CAA70004 error keep coming back?
If the error returns frequently, it may indicate issues with your network configuration, corporate firewall settings, or Microsoft 365 tenant policies. Persistent authentication errors often require IT administrator assistance to resolve underlying network or policy conflicts.
Is error CAA70004 the same across Teams mobile and desktop?
The CAA70004 error can occur on both mobile and desktop versions of Teams, but the resolution steps differ. On mobile devices, try logging out and back in, clearing the app cache through device settings, or reinstalling the Teams app if the error persists.

Related Error Codes