We have added a new Active Directory 2012 Domain server and have removed the old 2003 DC.
We now want to add Exchange 2013 to the domain but we have to update Exchange 2007 SP1 to SP3 rollup update 10 before we can migrate.
I have downloaded SP2 and tried to set it up but it gives an error that the Schema is out of date.
From the Install location Setup.com /preparead on the Exchange 2007 Server gives errors about LDIFE not installed and the setup should be ran from the Domain Controller.
Running setup.com /preparead on the Domain Controller (2012) just aborts and gives an error saying it failed
We have 8 DC's, 2 of them are still running on Windows 2003, but they are remote, the rest of them are running 2008 so our domain / forest level is 2003?
What is the best way to upgrade to Exchange 2007 SP3 so we can bring Exchange 2013 in?