Licensing
As an MSP, you can add or update a license for a corporate customer. Go to Admin > Corporate Customers. Select the corporate customer you want to add or edit a license for, and select Licensing.
See Adding a License or Editing a License for further details.
If you already have a license, the following details are displayed:

Sub. No.: Unique system-generated number for a license.
License Type: The selected product when creating the corporate customer account.
PO Number: Purchase Order number for your corporate customer's account.
Users: Number of users who have been assigned licenses.
Start Date: Date on which your corporate customer's account became active.
Days: Number of days remaining in the license subscription.
Valid Until: Date on which the license subscription ends.
Status: Indicates the status of the license, which is either Valid or Expired.