Hi... This is Anirban from India.
I have deployed OCS and the microsoft TAP team helped me a lot.

I am facing a problem. I have a child domain controller, and I want users of those domain controller , enabled for OCS. my parent DC is abc.com and the CDC is Partner.abc.com. Now i want the user id to be as xyz@partner.abc.com. When I am trying to enable user for OCS, I am not finding the option in SIP for the domain Partner.abc.com.

Someone suggested to prep the CDC for OCS. How do I Do this also? Because I am not finding any options for the same.

Can You please help me.