KB ID 0001434
I was doing a ‘mop up’, after an Exchange install problem, (post to follow.) And went to look at the ‘Arbitration‘ mailboxes in the clients Exchange Organisation. And they could not be seen?
Get-Mailbox | -Arbitration Get-MailboxDatabase | Get-Mailbox -Arbitration
In my case, it was because the Exchange server was in a ‘Child Domain’ and the ‘SystemMailboxes’ are in the root domain.
You need to enter the following command first;
Then, (as shown above), re-run your commands, and the mailboxes should now be visible.
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