caa20003
Easy Fix
Microsoft Teams · Collaboration & Meetings
Teams authentication token could not be acquired.
Quick Answer
Error code CAA20003 on your Microsoft Teams Collaboration & Meetings means: Teams authentication token could not be acquired.. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Sign out and quit Teams fully.
2
Clear Teams cache.
3
Sign in again.
4
Disable proxy/VPN if interfering.
5
Retry after short wait.
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
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