A number of licenses has been defined for the platform: if this number is exceeded, a banner appears on the screen. 
Users. It will no longer be possible to create other users.
This screen allows you to enter a license key, which will enable other users to access the platform.
If a user is inactive, their license is released. They will have a license type - : this means that it has no associated license type.
You can see the current number of users on the platform, and the maximum number of users that can be created.
There are several types of license, depending on the mode activated on your platform:
4-license mode | 2-license mode |
Administrator's license | User license |
project manager license | |
Contributor's license | |
Viewer license | Viewer license |
The calculation of a user's license type takes into account all assigned roles (general, hierarchical, project, action) and their rights.
The type of rights assigned that has the highest value (Director > project manager > Viewer...) determines a user's license
For example, if I have 10 rights of type Viewer and a single Directormy license type is Director.
Rights required : 
Enter a key
This right gives access to both consultation and modification (validation of a key).
Key Allows you to validate the key that has been pasted into the field Key.