In your Application you are required to provide us with your ARMA 3 Player Identification Number (PID). This is a number unique to every copy of ARMA 3 and is used to add you to our XML file. This file is viewable by the community and also adds the unit emblem to both your character model and the side of any vehicle you may be operating. To find your Player Identification Number you will first need to launch the game just as you would normally.
Once Arma 3 launches to the menu screen click on Configure > Profile
Select your profile, click EDIT and you will see your Player Identification Number displayed under the Squad URL space, where the red box is in this example picture.”