I've read that at the very least to get an Exchange 2007 CCR cluster for fail over redundancy, you need 2 servers running Exchange 2007 Ent and a 3rd server of any type as long as its running any Windows Server 2003 OS (for the file share witness). Have others found this to be true?
Secondly, MS states that although its not necessary they recommend installing the file share witness onto a hub transport server. The only reason they give is that it will give the messaging admin greater control over the cluster, I'm not sure what that implies. I'm not going to use a hub transport server for the file share witness so what will I be missing out on or what problems might I run into? Thanks again for all the help!