Monitors and detects when contact has been lost with license server
Knowledge Base article:
Contact with the license server has been lost. This indicates server or network problems. As a result, the computer running Citrix Presentation Server has lapsed into a licensing grace period.
With the Citrix Access Suite Licensing feature, licensing is handled by one or more license servers. Computers running Citrix Presentation Server communicate with license servers to ensure that client sessions are licensed appropriately. This alert is raised when a server cannot communicate with its associated license server. This may be due to a hardware failure on the license server, the license service on the license server malfunctioning, or network problems between the license server and the computer running Citrix Presentation Server.
When contact with a license server is lost, the computer running Citrix Presentation Server lapses into a licensing grace period. Typically, the licensing grace period is 30 days. During this period, the Citrix Presentation Server software is fully functional and connections to the server work normally. Contact with the license server must be re-established before the grace period ends, or the software will be reduced automatically to single user mode and only the administrator will be able to log on to the server.
Make sure that your license server is operating correctly and that the license service is functional. When contact with the license server is re-established, the server automatically checks out licenses as required, and the licensing grace period ends.
External Knowledge Sources
You may find the following sources of information helpful:
Citrix Presentation Server Administrator's Guide - English
Advanced Concepts Guide for Citrix Presentation Server - English