When you launch Symantec Installation Manager 7.1.x and click on Add/Update Licenses, Licenses 'In Use' count is not visible on Product Licensing in Symantec Installation Manager
This is a Known issue and Symantec is aware of the issue. This issue will be resolved in Symantec Installation Manager 7.5
Check the license count on the Symantec Management Console or in Altiris Database (Symantec_CMDB).
1. To check the licenses "In Use" On Symantec Management Console go to Home--> Notification Server Management--> Portal
2. You can also check the status of the license in the SQL database, run below query to find the details as per the ProductGuid
SELECT ls.LicenseInUseCount, ls.Status, ls.TotalCount, ls.ProductGuid,vp.Name FROM LicenseStatus ls JOIN vProduct vp ON vp.Guid = ls.ProductGuid WHERE ls.ProductGuid = '6772A2A4-DD9D-4497-89CD-15FBF7DE3F7D' -- ProductGuid is of Inventory Pack for Servers