Hi Andrew and welcome to the Community!
It's a bit complex question, but in principle it should work.
Did you provided credentials linking SnapDrive with vCenter during SnapDrive installation? E.g. you should be able to see all virtual drives via SnapDrive console.
Also, with regards to the Exchange VM - I presume we are talking about data LUNs mounted as FC RDMs, right?
Regards,
Radek