When trying to install Exchange 2013 with SP1 on a Windows 2012 R2 Standard server (member server) in an existing organization containing one Exchange 2010 server with SP3 and RU7 installed I get the following message during the Readiness Check:
All Exchange 2010 servers in the organization must have Exchange 2013 Service Pack 3 or later installed. The following servers don't meet this requirement: .......
Not using an Edge Server. I have confirmed that the versions and build numbers of the exchange 2010 install are correct. I have confirmed that AD schema is at the correct version. Thank you