Email failures with Google due to "invalid_grant" with "Token has been expired or revoked."
If TopView is configured to email notifications with Google, you may receive email failures with an "invalid_grant" error message. The error may carry the description: "Token has been expired or revoked."
This can have a few causes:
- The token got revoked by an administrator
- The token got revoked automatically by Google's periodic renewal requirements
- The token expired
The solution is to renew your application's access to Google by Signing into Google on the TopView email setting page(s) - either outgoing or incoming, whichever is in use.
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