Servers can be configured as part of a server group, so that configuration changes that are applied to a single server, are then applied to all servers in a group. When managing a server that is a member of a server group, creating or updating objects using the Configuration API requires the applyChangeTo query parameter. The behavior and acceptable values for this parameter are identical to the dsconfig parameter of the same name. A value of singleServer or serverGroup can be specified. For example:

https://example.com:5033/config/Backends/userRoot?applyChangeTo=singleServer
Note:

This does not apply to mirrored subtree objects, which include Topology and Cluster level objects. Changes made to mirrored objects are applied to all objects in the subtree.