RecoveryManager Plus is licensed based on the number of on-premises Exchange and Exchange Online mailboxes backed up.
When you add a mailbox to a backup schedule, a license is automatically applied to the mailbox. This section allows you to remove licenses assigned to mailboxes.
The screen displays the following information at the top of the table.
When you remove a license assigned to a mailbox, backups of the mailbox will be deleted from your backup repository, and the mailboxes will be removed from any backup schedules they are part of.
You can remove licenses assigned to all mailboxes or just specific mailboxes.
To remove licenses assigned to all mailboxes in a particular tenant/organization,
To remove licenses assigned to particular mailboxes,