Lizenzen auslesen
Get-ExchangeServerAccessLicenseUser –LicenseName “Exchange Server 2013 Standard CAL”
Get-ExchangeServerAccessLicenseUser –LicenseName “Exchange Server 2013 Enterprise CAL”
https://gallery.technet.microsoft.com/68321b75-ab3d-4e04-9fe1-6a42de23b67f#content