Machine Failed Registrations (Alert)

Summary

Before any desktop/application can be brokered by the XenDesktop, Virtual Delivery Agent installed on the desktop or server machine has to register with one of the controllers in XenApp/XenDesktop site. A machine (VDA) registers with one of controllers every time it is going to be used (started) by XenDesktop. Machine for which registration fails is not available and is a wasted resource.

Failed registrations are monitored only for power managed machines (Desktop or Server OS). When failed registration is detected, an alert is created. Once machine with failed registration successfully registers, failed registration alert is automatically closed.

Causes

There are many causes, including: no Virtual Delivery Agent being installed on desktop machine, DNS problems, firewall configuration, time synchronization. For a complete list, see causes documented in Citrix knowledge articles below.

Resolutions

To resolve registration problems, see Citrix knowledge articles:

CTX136668 - Virtual Delivery Agent Registration Troubleshooting Flowchart

CTX129700 - XenApp/XenDesktop Virtual Machines Do Not Successfully Register with the Desktop Delivery Delivery Controller

CTX129225 - VDAs fail to register when using disjoint namespaces in a XenApp/XenDesktop Environment

CTX126992 - Troubleshooting Virtual Desktop Agent Registration with Controllers in XenDesktop