JSI Tip 3869. DNS Server becomes an island when a domain controller points to itself for the _Msdcs.ForestDnsName domain?

Microsoft Knowledge Base Article 275278 contains the following description:

When a domain controller, with a Domain Name System (DNS) service installed, is authoritative for the _msdcs. ForestDnsName domain (the forest root), it may not successfully participate in Active Directory replication. The preceding behavior can...