Currently we have a 2003 R2 DC with Exchange 2007 on it.
But we would like to upgrade to Exchange 2010. No I know that an inplace upgrade isn't possible, so I've worked out a little upgrade plan.
Migrate current DC & Exchange to a virtual machine
Build new 2008R2 server
Add 2008R2 to the domain as secondary DC
Install Exchange 2010
Migrate the mailboxes with the wizard
Uninstall Exchange 2007 on the virtual
Unauthorize the first DC and let the second new take over.
Now this is a summary, I have a lot more steps then this.Most of them come from here http://www.networkworld.com/community/node/47778
with a mix of technet articles
But is this all necessairy or is there an quicker/easier way to do the migration when the Exchange 2007 is installed on the same server as the domain controller?