How to create a SSL certificate for the AD RMS root cluster to support both the new and old URLs.

Hello,

I am referring this article, and trying to migrate RMS to ADRMS :

http://technet.microsoft.com/en-us/library/jj835767(v=ws.10).aspx

I am stuck at a point where not able to create ssl certificate with old and new url of cluster, (able to do that for fqdn name of old and new server )

I tried using offline CRC creation wizard and also gui option in iis 7, but does not let me click next if I use url's.

Does any one know why this step is needed, my old rms url is http only and not https, do I still need to do this?

Thanks