Multi-user Licenses: How to Assign Licenses
Every license you buy needs a unique username attached to it. You can assign and de-activate licenses in My Account as often as you would like - but make sure you do this setup as soon as you get a second license.
The process is easy and obvious when you log into My Account, but if you need help, there is a tutorial in the video at the bottom of the My Account page. Be sure to log into the account that made the purchases when you are trying to assign your licenses.