caa70004
Moderate
Microsoft Teams · Collaboration & Meetings
Teams failed to connect securely to required services.
Quick Answer
Error code CAA70004 on your Microsoft Teams Collaboration & Meetings means: Teams failed to connect securely to required services.. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Test Teams on unrestricted network.
2
Allow Microsoft 365 endpoints through firewall.
3
Disable TLS-inspecting proxy for Teams domains.
4
Update OS certificate store.
5
Retry sign-in and call join.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
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