Create License Balance Reports
The license pool represents acquired licenses from a purchasing perspective rather than the installations found in the network. For example, if you purchase 50 Office licenses in January and another 50 later, create two records with the same license name so the purchase dates and other commercial details remain traceable. Lan-Inspector combines the relevant records when calculating license balances and also considers package licenses, upgrades, downgrades, time limits, and other licensing parameters.
License balances and reports are described in the manual here, see 6.5.2 License Balance.