I need to Decrypt several workstations encrypted with McAfee using ePolicy Orchestrator 5.1.1. How??

We recently switched our AV and encryption solution from McAfee to Sophos. The Anti Virus went very smooth and the Sophos (SafeGuard) encryption server was fairly easy to configure and I have several machines encrypted. The problem is we have several Workstations that were previously encrypted with McAfee Orchestrator 5.1.1. I need to find them and decrypt them. Sophos already told me not to try and encrypt a machine that was already encrypted by another vendor.

I am logged into our old EPO server and have Orchestrator open. Under MENU I see Data Protection and Encryption Users and Encryption Recover under it. How can I tell which machines are already encrypted and what is the decrypt process?
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Don S.Commented:
Do you have any tags setup to enable or disable encryption?  How did you enable encryption in EPO initially?
this link refers solution for earlier version but it should be similar for your version too.

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