Originally Posted by jaztek
BES servers act as a "pass through" for exchange with the MAPI connection... utilizing very little cpu process and ram..
With the configuration I recommended, 4 BES Servers would probably utilize %10 of the boxes' resources....
90% would be for your SQL server...
Penquin please review the hardware config I recommended... Normally SQL is the recommended to be on a separate, physical box .. but in this instance, I disagree...
BES Servers just doesn't take up much resources....
I am very familiar with the hardware configurations and requirements.
You're only considering mail flow, and you're oversimplifying what BES is responsible for.
There's more to BES than just mail. You'll have MDS-CS traffic, Logging, Policy Services, Synchronization services, Collaboration services, application push, etc.
Those all take up CPU cycles and RAM as well.
What you're suggesting will likely work, but it's far from ideal.
2000 users is too manyu to have on a virtualized SQL database, especially when that same hardware is being used for 4 other VMs running active BES instances.