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How to Fix Microsoft Teams "Loading" Loop Error Code 0xCAA80000 (January 2026)

Stuck on the Microsoft Teams loading screen? If you are seeing the "Error Code 0xCAA80000" or a continuous loading loop after the latest January 2026 update, you are not alone. Thousands of users in the US, UK, and Canada are currently unable to join meetings. Here is the fast fix to get you back online.

​What is Error 0xCAA80000?

​This specific error is caused by a "Credential Token Conflict" in the new Teams 2.0 architecture released this month. When the app tries to refresh your login session, it gets stuck in a loop between your local cache and the Microsoft Azure cloud servers.

​3 Quick Steps to Fix Teams Loading Loop

​Follow these steps to bypass the 0xCAA80000 error immediately:

  1. ​Force Close & Clear Cache:
    • ​Press Ctrl + Alt + Delete and kill all Teams processes.
    • ​Press Win + R, type %appdata%\Microsoft\Teams, and hit Enter.
    • ​Delete everything inside this folder (don't worry, your chats are safe in the cloud).
  2. ​Disconnect Work/School Account:
    • ​Go to Windows Settings > Accounts > Access work or school.
    • ​Find your account, click Disconnect, then restart Teams and sign in again.
  3. ​The "Web App" Workaround:
    • ​If you are in a rush, open your browser and go to teams.microsoft.com. Log in there and select "Use the web app instead". This bypasses the local app bug entirely.

​Official Microsoft Response

​Microsoft has acknowledged a "stability issue" with the 2026.1.15 build. While a permanent patch is expected by the end of the week, the Cache Clear method is currently the only verified way for Tier 1 enterprise users to regain access.