When upgrading from Exchange 2010 to Exchange 2013 CU1 the setup might fail with the bellow error when the server specified in the error is running Exchange 2010 Edge Role and has been upgraded to Exchange 2010 SP3
All Exchange 2010 servers in the organization must have Exchange 2010 Service Pack 3 or later installed. The following servers don’t meet this requirement: ServerName.
For more information, visit: http://technet.microsoft.com/library(EXCHG.150)/ms.exch.setupreadiness.E15E14CoexistenceMinMajorVersionRequirement.aspx
The reason for this error is that the Exchange 2010 Edge role version is not written in Active Directory but rather in the subscription file and you have subscribed your Exchange Edge before it was upgraded to Exchange 2010 SP3.
The solution to this error is simply to resubscribe your edge server to your Exchange organization, more info on how to do this at
- Create an Edge Subscription File on an Edge Transport Server
- Import an Edge Subscription File to an Active Directory Site
after that rerun the Exchange 2013 pre-requisites check and it should pass without further issues.