Active Directory Rights Management Services
http://technet.microsoft.com/en-us/windowsserver/dd448611.aspx
AD RMS Troubleshooting Guide
http://social.technet.microsoft.com/wiki/contents/articles/13130.ad-rms-troubleshooting-guide.aspx
Link AD RMS
it's notes
“Tell me and I forget, teach me and I may remember, involve me and I learn.” ― Benjamin Franklin.