How to determine how many Authentication Services licenses are available (4285667)

Determining number of available QAS  licenses

In Windows using powershell (PS) you can determine how many systems are using licenses.

Note that this needs to be run on a system with the MS RSAT tools installed and depending on the version of PS you may need to run the following command in PS prior to running the below commands:

import-module activedirectory

This command will tell you how many machines were joined to Active Directory that include Authentication Services in the operatingsystemversion.

[PS] Get-ADComputer -filter {(OperatingSystemVersion -Like '*qas-*') -or (OperatingSystemVersion -Like '*sas-*') -or (OperatingSystemVersion -Like '*vas-*')} -Properties * |measure