Thank you both for your replies. I removed the secondary element for the phone and tried removing the key again, but received the same message. After that I found the number in the Remote Directory Numbers area. I was able to remove it from the secondary controller but not the primary. When trying to remove it form the Primary controller it throws this error message, "Cannot delete the Remote Directory number on hosts.". Running a manual synchronization failed in Your Site Explorer so I am working on fixing that and then I will try it again. If I figure it out, I will post on this thread.