You can call Aruba support to assist with this as well (1-800-WIFI-LAN) in the US. The "Welcome Center" can generate the eval licenses, however, they may need to transfer you to a support representative. After speaking with a support representative, they will transfer you back to the welcome center who will generate the certificate ID's.
Make sure that you have already migrated your licensing account over to the new HPe portal.
-HLavender