We are  decommissioning our first (original) exchange 2010 mailbox database that we first brought online when we did our coexistence setup with exchange 2007, and need to make sure we don't miss anything.

I remember already moving the arbitration mailbox off, but these still remain when I do a 

"get-mailboxstatistics -database tmpdb"

DisplayName               ItemCount    StorageLimitStatus                                                 LastLogonTime
-----------               ---------    ------------------                                                 -------------
Microsoft Exchange        3                    NoChecking                                                              
Discovery Search Mailbox  5                    BelowLimit                                                              
Microsoft Exchange App... 3                    NoChecking                                                              
Microsoft Exchange Fed... 3                    BelowLimit                                                              
SystemMailbox{d22f23fc... 5                    BelowLimit

Josh

Hi,

What I can think of is the system mailboxes:

http://social.technet.microsoft.com/wiki/contents/articles/3912.exchange-2010-how-to-delete-the-first-database-and-move-the-system-mailboxes.aspx

Thanks,

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