Prime Collaboration supported device doc should have the revisions for the provisioning and assurance servers.
I checked this for a PC Provisioning customer yesterday and PCP supports AD 2000, 2003, 2008 and 2012.
When LDAP is used with PCP, mutiple LDAP sources can be added and each Domain group that you want to have LDAP authentication must have a source chosen, or it will authenticate to the local database. Domains individually can authenticate to either LDAP, ACS/TACACS+ or local database so make sure you set the source the way you want.
Regards