We have a customer that had a 2008 RDS server with open license 2008 RDS user CAL's. Due to a change in their ERP software we need to transition them to Server 2012. As we started working on this we found out that their previous MSP did not give them the open license information with the authorization number, etc. and, upon contacting the previous MSP, found out that they didn't keep any record of it. I know that the 2008 RDS CAL's can be used on 2012 RDS so we should be good from a licensing perspective once we can recover them. So here's my question:
How do you recover open license RDS user CAL's from a 2008 server without having the contract and authorization numbers and move them to a 2012 RDS server.
Thank you very much in advance for your assistance.