Although I have purchased only 100 licenses for Sophos Mobile Control the web console shows three times more licensed devices.
First seen in
Sophos Mobile Security
Sophos Mobile Control
What To Do
Sophos has recently decided to change the licensing model for Sophos Mobile Control and Sophos Mobile Security.
The number of licenses a customer can purchase is now a "per user" license.
The purchased amount is multiplied by three as it is assumed that one user could have up to three different devices.
For existing installations, the multiplication takes effect once an existing license is updated or additional purchases are done.