Activation security is unique to DCOM. The DCOM framework provides the ability for an OPC client to access the GagePort Mitutoyo OPC Server object. If the OPC server object is installed on another computer node, then the framework launches (or activates) the OPC server (if it already not running) on behalf of the client. Activation permission checking works the same as authorization permission checking. An authenticated client's user identity is checked against the OPC server's ACL for launch permissions. Activation permissions for the GagePort Mitutoyo OPC Server are setup using DCOMCNFG.
About DCOM security.