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Event 1050 - Citrix Desktop Service



I have a very simple Citrix XenApp installation which has been working fine then as of last Wednesday, has started to cause me issues.

I am running XenApp 7.17 (Recently upgraded) and now have a problem with users intermittently being unable to connect.

The server is 2012 with the VDA installed directly on it i.e. No PVS or MCS

The users get an "Access Denied" error message when trying to launch applications.  Others can connect and rebooting the server appears to clear things until the next day when the issue reoccurs.

Looking at the event log, I am seeing some events which look to be related:

Event ID: 1050

Source: Citrix Desktop Service

Connection Validation Failed on domain "for User" for reason Deny


In Director, I am also seeing connection failures with a Failure Reason of "None"


Anyone able to shed any light on this?

Any help would be really appreciated.


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