Backup source "Microsoft Exchange/Mailboxes/ does not exist" on one mailbox. Other mailboxes can be backed up

BOBcloud Backups (desktop and server)
1

Error

When backing up on-premise Exchange mailboxes, you see this error on one mailbox: “Backup source Microsoft Exchange/Mailboxes/mailbox-name does not exist”.

Cause

The BOBcloud backup software cannot access the required mailbox because of insufficient permissions, or the mailbox is hidden from the GAL (global address list).

Resolution

  1. Using your on-premise Active Directory Domain Controller, open Active Directory Users and Computers.

  2. Locate the user mailbox that you are unable to back up.

  3. Click on the Attribute Editor tab.

  4. Edit the attribute msExchHideFromAddressLists, and set it to True.