You can delete a mailbox, a group or an organizational unit from the backup content of a Gmail app. When you delete, backup jobs no longer run on that mailbox, group, or organizational unit but the previously backed up content will still remain.
After a mailbox is deleted, you can browse the mailbox's data for 60 days after the date of deletion. After 60 days, until the retention criteria is met, you can continue to browse the deleted mailbox's data using the Show deleted items option. After the retention criteria is met, the user data expires.
For example, if data retention is set to 3 months and the mailbox is deleted on January 1, until March 1, you can browse the deleted mailbox's data as active items. After March 1, you can browse the deleted mailbox's data only by using Show deleted items. After April 1, the deleted mailbox's data cannot be restored or browsed.
Procedure
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From the Command Center navigation pane, go to Protect > Google Workspace.
The Google Workspace Overview page appears.
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On the Apps tab, click the Gmail app.
The Overview page of the app appears.
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On the Mailboxes or Content tab, select a mailbox or a group or an organizational unit that you want to remove, click More, and then click Manage > Remove from content.
A confirmation dialog box appears.
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Click Submit.