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Problem: An error message indicating the failure to synchronize internal domains in scheduled user data synchronization for Gmail.

The possible reason is as follows:

This occurs if your organization started to use the Gmail protection functionality in public preview. During that stage, Cloud App Security was not granted the domain read-only permission during service account provisioning, and thus not able to synchronize the internal domains of your organization.

Perform either of the following:

  • De-provision the Gmail service account that you used in public preview, and re-provision a service account for Gmail.

  • Go to Advanced Threat Protection > Internal Domains or Administration > Global Settings > Internal Domains to manually add the internal domains of your organization. Repeat this every time there is a new domain created for your organization.

Parent topic: Troubleshooting