To purchase a new licence, navigate to the Purchased Licences tab on the Licence Matrix screen, modify the Revised Purchased value, and click Save.
You will then be prompted to Confirm the change.
Note: You will be billed from when you confirm this transaction and not from when licences are assigned to users; so only add what you need.
The licences will then be immediately available in the User Allocation Matrix tab.
Also note that only the Licence Administrator for a site will be able to add or remove licences.
For more information on this, please click here: Licence Purchasing Help Page click the question mark in the top right-hand side of the screen.