# Role of the Admin and Administrators

In RealityHub, **the admin** is the first & default user created during the installation. After the first installation, the admin can organize the hierarchy inside the user management module. See [Installation](https://zerodensitydocumentation.gitbook.io/docs/realityhub-1.3/realityhub-1.3/installation-and-configuration/installation)

The main differences between the admin and other administrators:

* The admin can only access User Management and Configuration modules, while administrators can be configured to access all available user features/modules. See the [License Reservation](https://zerodensitydocumentation.gitbook.io/docs/realityhub-1.3/realityhub-1.3/user-management/advanced-user-management/license-reservation)
* The admin is solely a read-only user. No administrator can remove the admin from the system.
* The admin is a member of the read-only “**Administration Only**” user group and cannot be a member of other user groups, the resolved policies, and cannot have reserved licenses. See [Example Module](https://zerodensitydocumentation.gitbook.io/docs/realityhub-1.3/realityhub-1.3/user-management/advanced-user-management/example-configuration)