I'm running 2 physical ESX 3.5 servers. I've virtualized my Exchange server and it has been running great up until a few weeks ago. Now I'm getting the annoying "attempting to retrieve data from server" message for all of my users several times per day. Some its several times per hour. I'm running on a Cisco network with Dell 2950 daul quad-core systems with 32GB of RAM each. I'm not taxing the CPU or Mem on it and I've done perfmon stats and found nothing out of the ordinary. Does any have ANY info that might help???
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Exchange 2003 and ESX 3.5 performance issues