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Ok, the toast notification is an issue, but a red herring to the actual issue I am having. I was told the test server was built like production, but the version wasn't updated on the test server. Now with the same version of the RDP client the symptoms are the same. In an RDP session as admin or user, the client works. In a published Citrix desktop, the client works. In a seamless session attempting to subscript to a server give an error shown in the attached image. I have tried all of the seamless flags with no effect. I have tried UVIProcessExcludes, as mentioned above. Probably will have someone open a ticket with Citrix and see if we can get it to work.

I think your issue may be that is needs Explorer.exe running. To test this, do something like this.. • Publish Notepad • Launch Notepad • Hit CTRL+F3 to bring up Task Manager in that Session • File > Run new task: Type explorer.exe • Start the app once Explorer.exe is running Does that now work?

I actually thought the very same thing when I first tested. We don't allow users to run task manager in session, but do publish Explorer for file management for them. I did try that first thing yesterday with the same results. I did try to see if I could get it go using your instructions just in case what we are doing is somehow different. We have another product that has the same issue and I created a login script that launches Explorer for that product. It may launch somehow differently than the published versions, so figured I'd give that a go as well, but same results. Can see explorer running in the user session.

Ok, another issue could be the Working Directory in the published app not set. Set it to the same folder location as the exe. Some times the exe can't find the resources is needs.

Thanks for the idea. It was not set. Set to match now, but same behavior.

What about if you start Notepad, then Shift+F2 to break out of seamless mode and then start the published app. Does that work?

No it doesn't work. I did have a bit of an "ah-ha" moment before work this morning. I read somewhere yesterday that the new RDP client is written as a UWP application. Thus, I'm pretty sure it won't work in a seamless session. Still going to see if Citrix can come up with something, but I don't have high hopes.

The one that installs to "C:\Program Files\Remote Desktop\msrdcw.exe" ? I'll try it myself and let you know if I have any luck.

That's the one, yes.