You need to ensure that all users retrieve the location…

Your network contains an Active Directory Rights Management Services (AD RMS) cluster named Cluster1.
You plan to change Cluster1 to a new AD RMS cluster named Cluster2.
You need to ensure that all users retrieve the location of the AD RMS templates from Cluster2.
What should you do?

A.
Create an alias (CNAME) record named clusterl.contoso.com that points to Cluster2.

B.
Modify the Service Connection Point (SCP).

C.
Modify the templates file location of the rights policy templates.

D.
Modify the exclusion policies.

Explanation:
Only one SCP can exist in your Active Directory forest. If you try to install AD RMS and an SCP already exists in your forest from a previous AD RMS installation
that was not properly deprovisioned, the new SCP will not install properly. It must be removed before you can establish the new SCP.
SCP – Service Connection point holds the IP address of the ADRMS Certification Cluster. You can ONLY HAVE ONE OF THESE on your network. If you install
ADRMS, and then uninstall it, the SCP might still be there, so when you attempt to reinstall ADRMS you will need to delete the old SCP. You can delete the SCP
with Active Directory by using the Sites and Services console or with Adsiedit or AD RMS Itself if it is still installed OR you can download the AD RMS

Administration Toolkit and run ADScpRegister.exe unregisterscp – haven’t seen this though.
http://social.technet.microsoft.com/wiki/contents/articles/710.the-ad-rms-service-connection-point.aspx