To confirm that this worked:
From the GroupWise Disaster Recovery Web Console, select a Post Office profile.
Select the Backups tab.
From the Actions of Existing Backups, select Turn On Access to the Most Current Backup or Turn on Access to Prior Backups.
Move a few items that exist in the backup to the Trash.
Select File > Open Backup.
This view will show the items in the GroupWise Disaster Recovery backup, and NOT on the production GW server for the user.
Move the items to Trash.