AD Syncronizer Question

Hello,

I've spent the last hour or so reading the forum to avoid asking something that has already been covered, so I apologize if this has already been answered before.

I am using AD syncronizers to keep 4 AD domains synced. I cannot, for the life of me, find how to make them remove connections that have been removed from Active Directory.

Example:

Server A is built and added to AD. The sync runs and adds Server A to the connection list. Then, 6 months later I realize we don't need Server A and remove it from the domain. Then the sync runs again and Server A's connection object stays in RDM.

How can I have this automatically removed? I am running 11.0.6.0 RDM Server, and 11.0.6.0 client fyi.

Thanks!
-Aaron