For changing the name of the main branch from the default name ("company"), see Editing the name of the "company".
For configuration of the main branch and the sub-branches, the user must have the administrative rights for all relevant branches. For administrative rights of a sub-branch the user has to be assigned to the sub-branch or to the main branch.
Like the main branch, sub-branches can contain entities that are constricted to the branch itself. Entities of the main branch cannot be configured from the sub-branch.
Entities, such as maps, cameras or layers, are either configured with the CoreServiceMaster (CSM) of the main branch for all CoreServices. The entities thereby "refer" to a server (CSM or CSS). Basically, only references in the sub-branch, or from the main branch to the sub-branch are allowed. There are no references between sub-branches.
For the relationship between CSM and CSS see Relationship between the CoreServices - master and slave.
The only exception for references from the CSS to the CSM are cameras and Device Management servers, where the camera of a sub-branch can be managed through the Device Management server of the main branch, thereby relieving sub-branches of installing their own Device Management server.