There are applications out there that require access to the system mailbox. I've scoured the web searching for tips or tricks, but I cannot for the life of me figure out how to enable the system mailbox account in 2007.Any pointers to sites/docs or tips would be greatly appriciated.

Hello, This will give you more information about System Mailbox and discussion on various FAQs... Exchange Special Mailboxes Part 1 - System Mailbox http://blogs.technet.com/evand/archive/2004/12/17/323636.aspx

I understand what the System Mailbox is. I want to know how to enable it in 2007. The link that you provided was for 2003.

Here is part 2 of the article mentioned above. http://blogs.technet.com/evand/archive/2004/12/21/329172.aspx Note that the article applies to Exchange 200x not only to Exchange 2003. The process of logging onto SA mailbox is faily complicated and PSS can help you with that. I am curious, however, to find out if what you are trying to do is supported by vendor. If you have vendor support the application you are trying to use with Exchange 2007, they should be able to provide instructions of what needs to be done. I fear you have application that was written for Exchange 2003 and trying to make it work with Exchange 2007 may cause you headaches when you call vendor or Microsoft for support.