How to increase the number of licenses of your subscription?
1. First, sign in to the Admin Center using the same username and password you used when you bought your subscriptions. Click on ‘My Products’, and then select the subscription you want to edit.
2. Click on ‘Actions’ and select ‘Edit Subscription’. A new window will appear.
3. Use the arrows or type the number of licenses you wish for the selected subscription. Click on ‘Confirm’.