Overview#Key Access Partition (KAP) is an eDirectory container is created underneath the Security Container.
Inside the Key Access Partition container, the W0 object is created. The KAP and W0 objects represent the Security Domain for the tree. A server, or list of servers, are assigned to be the "W0 server". The W0 Server's job is to hand out the SDI Key or "Treekey" to other servers in the tree.
Any server can be configured as a "W0 Server" and therefore there can be multiple Security Domain servers "W0 Servers" in a tree.