Hello David. I too work for the VA IT department and have been searching for a fix to use the Citrix for iPhone app. Unfortunately, Apple has not made the necessary fixes to allow the iPhone recognize the .ica file format as a Citrix application.

This was the same reason the iPad did not work initially however, Apple fixed the bug with the iOS 4.3 update. Citrix for iPad works at both VISN and National level with a very simple configuration.

Fixed issues in Citrix Receiver for Mac 12.3 Compared to: Citrix Receiver for Mac 12.2 Citrix Receiver for Mac 12.3 contains all fixes that were included in Versions 12, 12.1, 12.1.100, and 12.2, plus the following, new fix: If Citrix Receiver for Mac is configured to use a proxy server, Secure Socket Layer (SSL) connections can fail. Mac OSX users are unable to sign on to the OSX Receiver client and are denied access to their apps and desktops. # 651273 More information about the issue: Issue is happening when storefront servers are load balanced and we use FQDN that resolves to Load balanced IP in session profile of Netscaler. Citrix Receiver is EOL, you should move to Citrix Workspace App which works on 10.15 (i suspect you mean Receiver 12.9.1 which was the last version for Mac, 4.12 was Windows) I would also strongly recommend sticking to the native client when one is available (Windows, Mac, Linux etc), the only time i ever would recommend the use of the chrome.

Adobe Download Failed Using Citrix Receiver Mac Older Versions

Unfortunately, this is a case in which Apple must make mods in order for Citrix to work on the iPhone. Im still working on a workaround. If you need a how-to guide for the iPad, I can email you a copy. Joseph