We are running AD 2003 SP2, Exchange 2007 SP1 in our current environment. We are looking to upgrade to Exchange 2010, but that's down the line.
We also have a partner company that we do business with, who are also running AD 2003 SP2/Exchange 2007 SP1.
At the moment, we have no corporate IM system so use MSN. We're looking at bringing in OCS 2007, but would like contacts from both our company and partner company to be able to IM each other.
I understand there is the concept of federation, but this is for completely external company's isnt' it. Is there anything within OCS that can help us between us and the partner company only?