If you grant the user the KB Manager role, they will be able to manage category visibility and access but will also have access to all other KB content.  The "KB Manager" role is considered an administrator for a specific knowledge base. This role has significant privileges within the knowledge base system.

This role is intended for users who will be creating and assigning categories to specific user groups and performing all knowledge base administrative actions, as it grants broad administrative access across the entire knowledge base only.

The KB Manager role is assigned through the plugin settings in Access Manager.

Steps to assign a KB Manager role:

1. Go to the Users tab.

2. From the Group dropdown, select All Groups (KB Manager).

3. Add the user as a KB Manager.

4. Once added, the user will be assigned the KB Role Manager permissions.

Note: It is not a default WordPress role.