You must be a member of the Administrators Group to perform this operation.
Click the "Key Assignments" button.
The assignment list contains all users, which are a member of your team. The key-column indicates the current key assignment for each user.
To assign another key to users
If you want to assign only one specific key, you can change the option from "Use key(s)" to that key.
You may also change the keys assigned to users at a later point in time.
Filter option: If you want to assign licenses to a specific group of people, you have the option of copying the names from another file or dragging them directly into the filter.
For an overview refer to: