Overview
Below is the App Selection screen you will see after logging in.

Note: Depending on your permissions (or your users' permissions), it's possible that not all apps will be visible.
eFax / SMS / My Extension
This app contains what is referred to as "UCP Boxes" which allow users to access eFax, SMS conversations, their extension settings, and AnswerCare answering service configurations.
This app is only visible if the user has one or more of the following permissions:
- UCP: Single Box on Container
UCP: All Boxes on Container
Admin: All tenants on Container
Phone System Admin
This app contains the administration area for phone systems, where admins can manage call flows, IVR menus, pull reports, and listen to call recordings.
This app is only visible if the user has one or more of the following permissions:
- Admin: Single Tenant on Container
- Admin: All Tenants on Container
User Management
This app contains a list of all users that you have visibility/control over, and allows you to add users.
This app is only visible if the user has the following permission enabled:
- Can Manage Users
Assuming the above permission flag is set, the app will only allow you to manage users that share the same permissions as you do.
If the logged-in user only has access to a single tenant on a single container (Admin: Single Tenant on Container) they will not be able to see or add users.
If the logged-in user has Admin access to ALL TENANTS on a container, they will be able to see/control users that also have Admin access to that container (even single-tenant users)