Have you inherited a XenApp 6.5 environment? Share your war stories in the comments.
Do not invest time in fixing it. Invest time in migrating off it. Modern Citrix Workspace app + StoreFront or HTML5 access is faster, more secure, and infinitely less frustrating. citrix xenapp web plugin
:: Re-register the control (IE 32-bit only) regsvr32 "C:\Program Files (x86)\Citrix\ICAClient\Plugins\wficat.cab\wfica.ocx" For its time (2005–2012), the XenApp Web Plugin was a clever solution. It turned a clunky ICA file download into a one-click web experience. But by 2015, it was a legacy liability—an insecure, browser-bound bottleneck. Have you inherited a XenApp 6
Note: This plugin is a legacy component (circa 2008–2014), largely replaced by Citrix Receiver and now Citrix Workspace. However, it is still relevant for environments running older versions like XenApp 5, 6, or 6.5. If you are managing a legacy Citrix environment (XenApp 6.5 or earlier), you have encountered the Citrix XenApp Web Plugin . Before the era of the unified Citrix Receiver, this plugin was the primary gateway for end-users to access published applications and desktops via a web browser. Invest time in migrating off it