T012 QuotaExceeded

The target Google Workspace user ran out of storage during the import.

Why it happens

The user's storage quota was exceeded or failed verification, so Gmail could not accept more data.

How to fix it

1. 1

   Step 1

   Check the user's storage in the Admin console.

2. 2

   Step 2

   Add storage or raise the user's limit (check Google's current pricing for extra storage).

3. 3

   Step 3

   Run a delta import.

Source

Full guide: How to migrate from Microsoft 365 to Google Workspace →