This mean that until the minimum concurrent activation request is met, the KMS server is not offering licenses for Windows and Office client.
cscript c:\windows\system32\slmgr.vbs /dli all > c:\temp\KMS.log.Run the following command line on the KMS server to retrieve all installedlicences : Look for the _VLMCS entry to get your KMS Server name.Go to the DNS console / Forward Lookup Zones / /_TCP.To find which server is acting as your KMS : It is most probably been a long time since you’ve played around your KMS server. SQL server 2008 or later required (SQL Server Express supported).
Windows ADK 10 for Volume Activation Management Tool (VAMT) – Version 3.1.