I understand that similar questions have been asked before about this but the scenarios are slightly different or the questions appear to have been deleted.
We have a 2003 server with exchange 2007 which we need to upgrade. Our 2003 DCs have already been upgraded to 2012 R2 (currently still running at domain functional level 2003)
It would seem sensible to upgrade to exchange 2013 as its the latest version on a 2012 box, since Window 2008 seems to have a short end of life. However, there seems to be no easy way of taking the jump as exchange 2007 will not run on Server 2012.
It looks like I'm going to have to upgrade using the following path.
- Raise Domain functional level to 2012 RTM.
- Backup Exchange 2007 ready for re-installation.
- Migrate to Server 2008 with Exchange 2007 SP3 (doing a fresh install upgrade - reinstall Exchange backup and Config etc)
- Upgrade Exchange 2007 SP3 to Exchange 2010 SP3
- Backup Exchange 2010 ready for re-installation
- Migrate to Server 2012 with Exchange 2010 SP3 (doing a fresh install upgrade - reinstall Exchange backup and Config etc)
- Upgrade Exchange 2010 SP3 to Exchange 2013
Basically I'm having to use a Server 2008 and Exchange 2010 setup as an intermediate.
This seems like a very long and risky process. Have I missed something - Is there an easier way or should I just upgrade to Exchange 2007 SP3 on Server 2008 for now?
Thanks in advance.