Seats are spaces reserved for users. In order to add new users to your account, you need to make sure you have enough seats available. An account administrator can add or reduce seats at any time.
Note: Deactivating or deleting users will not affect the number of seats.
Modify the number of available seats
Navigate to the settings area
Select the Billing tab from the left navigation
Choose Manage Seats
From the Add user dialog, Add the user email choose their access level and, optionally, assign the user to a group.
The manage seats dialog will display. Use the Plus and Minus icons to add or remove seats.
Click proceed to verify the number of seats and check out.
Note:Adding and removing seats impacts your subscription cost. Whether adding or subtracting, the subscription cost is pro-rated for the remainder of the subscription period. You'll receive an email and invoice summarizing any changes made.