Understand the new data migration service reports

When migrating data with the new data migration service, you can access reports to get detail on migrated items. The 2 types of reports are a migration report and a user report.

On this page

Access the reports

  1. To download the reports in CSV format, in your Google Admin console of your target account, click Download migration report or Download user report.
  2. If the Tasks list doesn't open automatically with the downloaded report, click Tasks .
  3. For Your Tasks, click the link to open the file.

Interpret the migration report

The migration report gives detail on migrated items. You can use the report to identify items that didn't migrate and the reasons for the failure.

Error report field Description
Status The migration status of the item (skipped, warning, error, success)
Error/warning code & description

The code and message associated with the error or warning status.

For help with frequently seen error messages, go to Common error messages (later on this page).

Processing start time Start time of the migration of the item
Processing end time End time of the migration of the item
Source type & source identifier
  • Gmail message—users/user_email/messages/message_id
  • Gmail message crawler—users/user_email
  • Gmail label—users/user_email/labels/label_id
  • Gmail label crawler—users/user_email
  • Source URI—Full header (message-ID) of a message or label name from the source account
Target type & target identifier
  • Gmail message—users/user_email/messages/message_id
  • Gmail label—users/user_email/labels/label_id

Common error messages

If you get an error that is not mentioned in this table, try running a delta migration.

Error message Description & troubleshooting help
Temporary error occurred Run a delta migration.
User not found A user in the migration map wasn't found. Either the domain or the username is incorrect.

Remove the current migration map, correct the map, and upload again. For details, go to Create & upload a migration map.

User does not exist
User is deleted
The user has been deleted from the source account. Add the user to the source account, and run a delta migration.
Virus or other attachment problem Gmail blocks messages that might spread viruses, such as messages that include executable files or certain links.

For more information, go to File types blocked in Gmail.

Connection not in usable state Your connection contains errors and is no longer in a usable state.

Disconnect the current connection and create a new connection making sure you complete the authorization steps. For details, go to Run a migration.

All required OAuth scopes have not been granted access Some or all of the required OAuth scopes haven't been granted domain-wide delegation.

Disconnect the current connection, and create a new connection making sure you complete the authorization steps. For details, go to Run a migration.

Error occurred while generating user credential Domain-wide delegation hasn't been granted. In most cases, the domain-wide delegation process completes within a few hours, but you should allow up to 24 hours.

When the process is complete, run a delta migration to retry the failed tasks. For details, go to Run a delta migration.

Invalid user provided in migration mapping A user email ID in the migration map is invalid or is not a Google email ID.

Remove the current migration map, correct the map, and upload again. For details, go to Create & upload a migration map.

User provided in migration mapping does not belong to a workspace customer A user email ID in the migration map is not a Google Workspace email ID.

Remove the current migration map, correct the map, and upload again. For details, go to Create & upload a migration map.

User provided in migration mapping does not belong to the source workspace customer A user email ID in the migration map doesn't belong to the source account.

Remove the current migration map, correct the map, and upload again. For details, go to Create & upload a migration map.

Invalid label A label was deleted from the source account during the migration. Add the label again and run a delta migration.

You can also get this error if the target account is newly created. Wait for a few hours before trying the migration again.

Label name exists or conflicts with label This error can occur if a label on the source account already exists on the target account. Remove the label from the target account and run a delta migration.

Understand the user report

The user report provides a count for each user of the success or failure of their email migration.

User summary report field Description
Source user Email address of the user on the source account
Target user Email address of the user on the target account
Status Status of the user’s migration:
  • Running—Migration is in progress
  • Failed—Migration didn’t complete because of discovery issues. To troubleshoot, check the migration report for the specified error.
  • Completed—Migration completed successfully. Any messages or labels that didn’t migrate are listed in the migration report.
Emails migrated successfully Number of messages migrated successfully for the user (including messages that were skipped in an earlier migration)
Emails failed Number of messages that failed to migrate for the user

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