Disable Exchange 2010 arbitration mailboxes

For the purpose of my Forefront Identity Manager 2010 RC1, I had to use to Exchange 2007 instead of Exchange 2010 I was using (because at this stage FIM RC1 does not yet support Exchange 2010, but this is planned).

Here are the steps to achieve this:

- First you have to disable all users mailboxes in the Exchange 2010 Management console.

- Then you have to remove the Arbitration mailboxes.
Here is the script I created to remove them:

Foreach($mbdb in Get-MailboxDatabase) {
$mailboxes = Get-Mailbox $mbdb.Name -Arbitration
$mailboxes Disable-Mailbox -Arbitration
$mailboxes Remove-Mailbox -Arbitration -RemoveLastArbitrationMailboxAllowed
}

NOTE: (please add a "pipe" after the two last $mailboxes. This stupid blogspot does remove them!)

For more details about arbitration mailboxes, please check this blog: http://chrislehr.com/2009/10/exchange-2010-what-is-arbitration.htm