Automatic mailbox distribution is a new feature in Exchange Server 2010.

If you don’t provide a mailbox database when you create a new mailbox on an Exchange 2010 server, Exchange picks a mailbox database for you.

Now, you might see this as a really cool feature, or you might think it’s pretty scary.

To find out more about this feature, please read :

Where Did That New Exchange 2010 Mailbox Go?
http://technet.microsoft.com/en-us/library/ff872148.aspx

Kind regards,
Catastrophic Failure “JV”