Connect with us

Hi, what are you looking for?

Citrix XenApp

Legacy Citrix apps not launching on newer Web Interface servers

If you ever try adding a legacy Citrix Presentation Server 4.0 farm to a Web Interface and the apps don’t launch, check the application event log on your Web Interface servers for Error 31203 messages like below:

Source: Citrix Web Interface
Event ID: 31203
The farm XXXXX has been configured to use launch references, but a
launch reference was not received from the Citrix XML Service.
Check that the farm supports launch references or disable launch
reference requests. [Unique Log ID: XXXXXXX]

Launch references are only support with Presentation Server 4.5 and above. To fix this, go to your WebInterface.conf on your Web Interface servers:


and change RequireLaunchReference and OverrideIcaClientname to Off and On respectively:


Update September 4, 2012:
I was informed by our Citrix SE this issue impacts Storefront as well. The work around above will work by changing the same settings in the web.config of the Storefront site.



  1. IronVarmint

    September 13, 2012 at 2:29 PM

    I’m migrating an old Metaframe farm to XenApp 6.5 and have been scratching my head with this question for a few hours now. I thought there might be a setting in the webinterface.conf somewhere. I tried removing socket pooling, but that wasn’t it. Finally I put the right terms into Google and got here. Thank you again Jason for all the information on your site!

  2. Adam S

    August 2, 2014 at 1:57 AM

    Genius mate.
    Thanks heaps.

Leave a Reply

Your email address will not be published. Required fields are marked *

You May Also Like

Citrix Workspace

You can use FIDO2 hardware security keys plugged into your physical desktop over the Citrix HDX remoting protocol for use with virtualized Windows Desktop...


Today I would like to go over proper URL redirection when using SSL but first I would like to preface this by describing what...


In a worst case scenario and all your web servers have failed, what do you do? You could have a standby group of servers...

Microsoft Identity & Access Management

EUC and Security Engineers have always had the capability to add a EULA to Citrix StoreFront and/or Citrix NetScaler Gateway (aka Citrix Gateway) for... began in 2008 as a way for me to give back to the IT community. This website features the latest news and how-to's on enterprise mobility, security, virtualization, cloud architecture, and other technologies I work with. This website has evolved over time to become a go-to reference hub for these technologies. It receives hundreds of thousands of unique visitors from all over the world each month. More details on the About Me page.
Copyright © 2008-2023