Hi We have 5 forests (all managed separately). They have 2k7, 2k10 and 2k3 exchanges :-( FIM 2010 was used to sync the contacts between these AD domains. The eventual goal is to see free/buys info in outlook for users in other sites. Would you please advise on this? Here is what I know Required: I read about the sites needing UCC certificates for autodiscover & OWA Required: Autodiscover being available inside and outside Required: Cmdletes to be run on exch2k7/2k10 sites Required: mail enabled account on each domain with minimal rights Having different versions of exchange throws me in a loop.