Event ID - 16

Event Id16
SourceMicrosoft-Windows-TerminalServices-Licensing
DescriptionThe Terminal Services license server could not return an expired Terminal Services client access license (TS CAL) to the available pool of TS CALs because of following error: %1!s!.
Event InformationAccording to Microsoft :
Cause :
This event is logged when Terminal Services license server could not return an expired Terminal Services client access license (TS CAL) to the available pool of TS CALs because of error.
Resolution :
No further action is required
The Terminal Services license server was unable to contact another license server on the network, probably because the other license server was temporarily unavailable. The license server will try again to contact the other license server.
This is a minor warning and there is no impact to the continued functionality of the license server.
Verify :
To verify that Terminal Services client access licenses (TS CALs) are installed and available on the Terminal Services license server, use the TS Licensing Manager tool.
To perform this procedure, you must have membership in the local Administrators group, or you must have been delegated the appropriate authority.
To verify that TS CALs are installed and available:
  1. On the license server, open TS Licensing Manager. To open TS Licensing Manager, click Start, point to Administrative Tools, point to Terminal Services, and then click TS Licensing Manager.
  2. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
  3. In the left pane, expand All Servers, and then click the license server. In the right pane, the type, version, and number of TS CALs installed on the license server is listed.
Note : To verify that the terminal server can discover (contact) a Terminal Services license server with the appropriate type of Terminal Services client access licenses (TS CALs), use Licensing Diagnosis in the Terminal Services Configuration tool on the terminal server.
Reference LinksEvent ID 16 from Source Microsoft-Windows-TerminalServices-Licensing

Catch threats immediately

We work side-by-side with you to rapidly detect cyberthreats
and thwart attacks before they cause damage.

See what we caught

Did this information help you to resolve the problem?

Yes: My problem was resolved.
No: The information was not helpful / Partially helpful.
 Refresh