Right now all our Exchange Servers are 2003 SP1. Our lone BES server has ESM w/ SP1 installed as well. Would there be any problems if were to only upgrade the ESM to SP2 on the BES server withhout upgrading the actual Exchange servers in our environment to SP2? I'd like to instal BES SP5a on our current BES server which is on SP3 right now.

Thanks in advance,
Jay