To unassign a SonicWall Cloud App Security license
Repeat this step for each user for you want to remove their license.
If you are assigning licenses to your entire organization, and not using Group Filters, Cloud App Security will attempt to use all of your available licenses. For example, if you have 100 licenses and 200 users, and unassign licenses for 5 users, the next five users alphabetically who did not previously have licenses will be automatically assigned one.