# License Sources

Licenses used on a controller can be pulled from several different sources. The number of simultaneous sources is limited to 10 (either 10 FMS Portable sources, or one License Server (TT2) in addition to 9 FMS Portable sources). If you would like to add licenses from a source when the source limit (10) has been reached, all licenses from one source need to be removed from the controller to make room for licenses from the other source.

## Source Overview

The Source Overview tab (License assignment > Source Overview) provides the user with an overview of the licenses installed on the controller, as well as where they were installed from. A maximum number of 10 different sources can be displayed here, and each will be designated with FMS P (for FMS Portable, or dongle), or License Server (TT2).

Clicking on any license source will present that source's detailed license source information. It lists the source name and type, as well as the number and type of licenses in each category (Virtual Station Type, Virtual Station Feature and Controller Feature).