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Fixing Microsoft Teams Authentication Failed for Guest Users - Troubleshooting Windows Security Proxy Synchronization-Troubleshooting OneDrive SSL Expired Certificate

Updated 2026-06-14 03:28:35macos-help
Fixing Microsoft Teams Authentication Failed for Guest Users - Troubleshooting Windows Security Proxy Synchronization-Troubleshooting OneDrive SSL Expired Certificate
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.