Trying to delete a mailbox database - Exchange 2010 SP3 RU5

After having moved all the user mailboxes to a new mailbox database, when I try to delete the old mb db, I get the error that it cannot be deleted. When I run the get-mailboxstatistics command on the old mb db, I see:

OK, so I have to move the arbitration mailboxes, but when I run the commands necessary to get and move the arbitration mailboxes, it can't seem to find them and nothing happens, as seen here:

What do I do to get these moved so I can delete the mb db?

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Will SzymkowskiSenior Solution ArchitectCommented:
You need to remove the Arbitration Mailboxes that are on this database.
Get-Mailbox -Arbitration -Database <database name> | Remove-mailbox

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guru-di-exchangeAuthor Commented:
Hi Will,
I tried your command, but the same problem is present, the Get-Mailbox -Arbitration -Database <database name> portion of the command does not return any results.

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AmitIT ArchitectCommented:
Did you tried steps in my article.
guru-di-exchangeAuthor Commented:
Hi Amit,

Yes I did! The -ViewEntireForest $True option was the key!! I did this once a few years ago and totally forgot about this option. I need to update my notes.

Thank you so much Amit! And Will, thanks for chiming in as well!!

I knew this was the right place to get my answer.
AmitIT ArchitectCommented:
That's why we are here...
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