Hi,
We have a client who were running the following setup:
2 x Exchange 2013 CU2 CAS servers / Win Srv 2012
2 x Exchange 2013 CU2 MBX servers / Win Srv 2012
Active Directory etc, basically everything else, runs on Win Server 2012.
Due to upgrading etc, one of the mailbox servers has been removed. It is to be installed with Ex2013 SP1 with 2012 R2 from scratch, and eventually also upgrade the remaining CAS and MBX srvers with SP1 and 2012 R2.
So my question is..will this present a problem? Is it possible to have one MBX running 2013 CU2 on Server 2012 and one MBX running 2013 SP1 on Server 2012 R2?
I've read that failover clustering service is not possible between 2012 and 2012 R2, but i'm not sure how this effects Exchange.
Thanks for your time.