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jrbuero's avatar
jrbuero
Copper Contributor
Apr 21, 2026

CRM Teams Connection Problem

I have CRm integreated in Teams and every time i need to use crm app function like email-sync i get an error.

adoption
microsoft teams

1 Reply

  • Sayali-MSFT's avatar
    Sayali-MSFT
    Icon for Microsoft rankMicrosoft
    May 08, 2026

    Hello jrbuero,
    The issue occurs due to the CRM email sync endpoint being unavailable or outdated. The Teams app is invoking a backend API (crmaas-sync service) that either no longer exists at the expected route or is rejecting the request due to invalid/expired authentication. This results in a “resource unavailable” error when triggering email sync operations.

    Key Troubleshooting Steps (CRM Email Sync in Teams)

    • Validate the failing URL directly
      Open the CRM email‑sync URL in a browser to confirm if the issue is backend-related.
    • Check CRM backend service (Azure/Web App)
      Ensure the CRM sync service is running and the endpoint (e.g., /sync/mail) still exists.
    • Re-authenticate CRM connection
      Sign out and reconnect CRM/email sync to refresh expired or invalid tokens.
    • Clear Teams cache
      Remove cached data to eliminate stale links/configuration.
    • Reinstall CRM app in Teams
      Remove and re-add the app to refresh stored settings.
    • Verify manifest and endpoint URLs
      Ensure Teams app configuration matches the current backend API routes.