Good morning, I installed the Exchange 2010 in my lab and I created mailboxes for three users of Windows 2008 AD DS. As I had problems with Exchange 2010, I uninstalled the Exchange 2010 and after I installed Exchange 2007 in the same machine. However, the mailboxes that I had created for the three users were there. And now I can't edit them or delete them, returning an error that says I can only run the operation using a console version 14. When I try to access some of these mailboxes by OWA, get an error saying that the mailbox does not exist. How can I delete these mailboxes and create others for these users? Thank you, LeandroLeandro Lacerda

Remove the user accounts from Active Directory Users and Computers on Domain Controller and create them back with EMC of 2007...Amit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com

I found a way to solve the problem without remove the user accounts: change the attribute msExchVersion of the user accounts to <not defined>. Thus, the 'Disable' of mailboxes begin to function without problems. Thank youLeandro Lacerda