I am looking for the best advice to this issue. We have an Exchange 2010 SP1 Server running on Server 2008 Std and we need to move the database to Exchange 2010 SP 2 running on Server 2008 R2 Ent but the domain name has changed slightly for security purposes. Either way it is not the same name. Now I already know I have to update my current system to SP2 so that is not the issue. I have found a ton of blogs discussing moving to the same domain name but I have my reservations about jumping into this head first without the complete story. The database is not huge as it only has just under 70 users. It is just a matter that we cannot loose any email that is stored. Does anyone have a suggestion as to the best way to handle this? We are in a time crunch as this has to be completed very soon.