Lync 2013 now provides a useful PowerShell script for checking your Lync 2013 CALS
You can search by
UserBased / Device Based, Enterprise, Standard or Plus CALS. specify Start / End Dates and daily usages as well.
An Example can be found below that also outputs to a text file :
Get-CsClientAccessLicense -MonitoringDatabase “<Monitoring SQL Server FQDN>” -LicenseName “Standard” -LicenseBasedType “UserBased” -StartDate “01/08/2013” | Out-File c:filename.txt -width 120
For more information please see
http://technet.microsoft.com/en-us/library/jj204853.aspx
Enjoy!
Martin
