Knowledge Consistency Checker: runs on each DC and automatically generates the replication topology for Active Directory.
Also called Knowledge Consistency Checker.
Read more: Microsoft Learn
In the Ultra Transcenders books
Each book explains KCC in context, with comparison tables and the common traps.
Terms in this definition
- Agents (classic) API
First-generation Foundry Agent Service API, based on threads, messages and runs. It is deprecated, replaced by conversations and responses, and retires on 31 March 2027.
- Topology
A Network Watcher view diagramming the resources in a VNet and how they relate. Traffic and packets are not shown.
- AD
Short for Active Directory, the directory service built into Windows Server (AD DS). Entra Connect synchronises on-premises forests to Microsoft Entra ID.
Related terms
- Bridge all site links
Enabled by default, this makes site links transitive so the KCC may chain them for replication. Switching it off means manually created site link bridges govern routing.
- Connection object
Usually generated automatically by the KCC, this object tells a DC which partner it pulls replication changes from (inbound, one direction only).