I am in the process of upgrading our exchange to 2013.
I am following these 2 documents which are sligthly different. Neither one is working for me.
I got to the point where I have to do ADPREP
setup.exe /PrepareAD /IAcceptExchangeServerLicenseTerms /OrganizationName:”NAME”
and its telling me
Exchange organization name cannot be specified. There already exists an Exchange
organization with name 'NAME'.
I am confused at this point. This is a coexistance upgrade not a new install.
Do I even need to run ADPREP since my AD already contains the Exchange 2007 name?
I ran the prepareschema just before and that was COMPLETED fine.
Does anyone have a better step by step document for Exchange 2007 to Exchange 2013 migration
How do I get past this step?