What’s the difference between remove exchange attributes and delete mailbox? In this post of the Jason Dool we’ll undertand the difference them.
Over time, several people have inquired about the differences between the "Delete Mailbox" and "Remove Exchange Attributes" functionality in Exchange 2000/2003. Note: The Remove Exchange Attributes option only appears in the Exchange Tasks wizard within the Active Directory Users and Computers snap-in when the Advanced Features option is selected within the MMC console.
You cant get more information at source: http://msexchangeteam.com/archive/2006/10/13/429192.aspx
[Via Exchange Blog]