KB26267 - Unable to launch Citrix Xenapp Applications that are configured via the web interface after migrating from the Citrix Access gateway

This article describes an issue where an end user is unable to launch Citrix Xenapp Applications that are configured via the web interface after migrating from the Citrix Access gateway

• Users are using the Citrix Access Gateway to access Citrix XenApp applications.
• After configuring the XenApp applications via the Web interface option on the PCS gateway, when users click an application to launch it the following error occurs and the application does not open.

App Not available. Try again later.

The following solution applies to Citrix applications that are configured via the Citrix Access Gateway:

Open the Citrix Access Management Console and select Web Interface.
Right-click on site name configured to allow users access to the resources via the Connect Secure gateway and set the Access method to Direct.




If there is a firewall between the internal interface of the Connect Secure gateway and the backend resource application pool, configure a rule to allow traffic from the Connect Secure gateway's internal interface to the Citrix servers.

Ports 80, 443, 1494.
Port 2598 should be included if session reliability is being used.  

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