Login to the self-service restore portal with an M365 account that is a member of the DelegatedRestoreOperatorsForM365BackupPoweredByVeeam group.

US Portal:  https://vbm-01.e01.us.sherweb.cloud

CA Portal:  https://vbm-01.e01.ca.sherweb.cloud

Click on You to bring up the Specify Scope window.

Click on Filter to bring up filter options.  Put a checkmark for User and uncheck any other options. Finally, click on Apply.

This will show a list of all users being backed up by M365 Backup powered by Veeam.

NOTES

If you wish to exclude any of these users from the backup jobs, that can be done in the Microsoft M365 portal by adding those users to the ExcludedUsersForM365BackupPoweredByVeeam group. Users added to that group will be excluded at the next time backup jobs run.

If you wish to include unlisted users to backup jobs, that can be done in the Microsoft M365 portal by removing those users from the ExcludedUsersForM365BackupPoweredByVeeam group. Users removed from that group will be backed up the next job time backup jobs run.