Thank you for your response, I thought I would put the details in here so others do not have to wonder.
From the technet document
All failover activity occurring at the hypervisor level must result in a cold boot when the virtual machine is activated on the target node. All planned migration must either result in shutdown and cold boot, or an online migration that makes use of a technology
like Hyper-V Live Migration. Hypervisor migration of virtual machines is supported by the hypervisor vendor; therefore, you must ensure that your hypervisor vendor has tested and supports migration of Exchange virtual machines. Microsoft supports Hyper-V Live
Migration of these virtual machines.
From VMware tech support
I understand from your case description that you would like to know if VMware supports vmotion of an Exchange 2013 server, live, or does it have to be shut down first.
Yes, live migration of Exchange servers is supported.
You can go ahead with the migration.