SOLVED: Active Directory Inter-Site Topology Generator shows as "Invalid"
You may find that the Inter-site topology generator is listed as "Invalid" in Active Directory sites and services. If you view the data in ADSIEdit.msc and open the NTDS Settings You see the referenced server has a 0ADEL: prefix The 0ADEL: prefix indicates that the server to which the connection is to be made has been deleted, and the Active Directory Recycle Bin has been enabled. The server object is in the Recycle Bin (Deleted Objects container). While you're here - Why not check out our Active Directory Documentation Tool ?