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How to Fix Microsoft Teams Error caa70004

By Noah Reed · About Zone Desire

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caa70004

Quick answer

Microsoft Teams error caa70004 is a sign-in error, often caused by old cached credentials or network settings. Clear the Teams cache, remove saved Microsoft credentials, check TLS settings and sign in again.

What does “caa70004” mean?

Teams could not complete sign-in with your work or school account.

What causes it?

  • Corrupted Teams cache
  • Old saved credentials
  • Network or proxy restrictions
  • Disabled TLS 1.2

Steps to try

Stop when the issue is resolved.

  1. Quit Teams fully from the system tray.
  2. Clear the Teams cache (new Teams: Settings → Apps → Microsoft Teams → Advanced options → Reset).
  3. Open Credential Manager → Windows Credentials and remove entries starting with MicrosoftOffice or Teams.
  4. Make sure TLS 1.2 is enabled in Internet Options → Advanced.
  5. Restart the PC and sign in to Teams.

Need more support? Check the official help: Microsoft Support

FAQs

Can I use Teams on the web?

Yes. Go to teams.microsoft.com while you fix the desktop app.

Does resetting Teams delete chats?

No. Chats are stored in the cloud.