We have Exchange Server 2007 SP3 and the CPU on that server is at 100% all the time during working hours. The two processes which take the most CPU are Store.exe and EdgeTransport.exe.
Store.exe takes about almost 50% and EdgeTrasport.exe is at 10% or 20%. The memory RAM is always at 20% which isn't helping it. I found many users outlook wasn't set in cache mode so i started to enable that for them but it's still not helping. This server is running on VMware ESXi 5.1.
I'm not sure what could be causing the issue here.