Master Content Management Service
When you create multiple Content Management Services on a domain and associate the services with a Model repository, one service operates as the master Content Management Service. The first Content Management Service you create on a domain is the master Content Management Service.
Use the Master CMS property to identify the master Content Management Service. When you create the first Content Management Service on a domain, the property is set to True. When you create additional Content Management Services on a domain, the property is set to False.
You cannot edit the Master CMS property in the Administrator tool. Use the infacmd cms UpdateServiceOptions command to change the master Content Management Service.