License Administration Console reports an alert stating the Vendor Daemon is down.

The server displays the following error:
Citrix XenApp cannot contact the license server

And / or

Note: The Citrix License Administration Console has reached end of life and end of support in Citrix Licensing 11.16.3. Use the Citrix Licensing Manager

To resolve the issue, complete the following procedure: 

1. Update the system time discrepancy between the License and XenApp server(s).

2. Restart the Citrix Licensing service on the License Server.

   

Problem Cause

There is a time discrepancy between the XenApp server(s) and the Licensing server. A system time discrepancy of 2 minutes or greater can cause the Licensing Vendor Daemon to stop intermittently. Following is an example:

• XenApp Server Time

  

• License Server Time

  

The time discrepancy causes the Vendor Daemon to enter the “Stopped” status.

Citrix Documentation - Licensing 11.10