I've implemented an Exchange 2010 CAS array on VMWare and performing load balancing using Windows NLB. I understand this is not optimal, but unfortunately it's what I must work with. I am in the middle of putting together an Exchange 2007 to 2010 transition.
The NLB appears to function normally and is configured for multicast mode per VMWare's white papers. Static ARP entries are in place on all switches (or so I'm told) and I can ping the NLB VIP but cannot browse resources (ex. \\casarray\c$) if I'm on a different subnet than the CAS Array members. Essentially I get an "Error Code: 0x80070035 network path was not found." Appropriate ports are open on the NLB for MAPI and http/https traffic.
I did see a VMWare article that discusses Unicast and how the guest will need to be reconfigured:
Right now, I'm stuck. I can't proceed further in testing as my Outlook clients cannot attach to my CAS array.
So my questions are:
1. It looks as though VMWare does support Unicast. By going this route and following the article's instructions, could I bypass other potential network issues and keep things moving forward?
2. If I have to stick with multicast and my static ARP entries are in place, where else should I look?
Thanks in advance for you assistance.