How many Virtual Machines do Microsoft run with SCVMM?

I was surprised to see that our formal data centre hosts 1224 Virtual Machine instances on only 86 physical hosts - that's a pretty good consolidation story. It's all managed with System Centre Virtual Machine Manager (SCVMM) and has been running on beta software with zero impact on their Service Level Agreement.

There are countless instances of virtual machines and SCVMM used outside the data centre by Microsoft employees around the globe.