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I remember once while I was evaluating the Vcenter Convertor tool tried to convert one Hypfer-V VM to Esxi format and it worked just fine but I did it for testing purposes and there was no real danger. However, in your scenario like in Exchange as you mentioned, it could really be devasting situation. If I were you, I would have created a test VM and I would have installed exchange and would have ditone the similar kind of setings as it is present in this environment like adding to AD and all and would have tried the test machine first.
If you have time, I would suggest you to do so. This will enable you to take a proactive decision rather than a reactive one. I know this probably might not the answer you might be seeking, however, if you don't get your situation validated by a few experts, I won't see any other way out.