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If you're using Slack with Citrix and having trouble launching the desktop app, learn more about this problem and how to fix it.
Issues launching Slack
What's causing this problem
Citrix environments, like XenApp and XenDesktop, use Dynamic-Link Library (DLL) redirection to route API calls that perform extra tasks before calling Windows operating system APIs.
Due to an incompatibility between the Slack desktop app and Citrix's third-party DLLs, Slack may fail to load in Citrix environments.
What you'll see when launching Slack
The Slack app will appear not to start after you attempt to launch it. However, if you open the task manager, you'll see slack.exe processes running. Slack may show up in the taskbar as well, but you won't be able to interact with the app.
Typically, the app will finish launching after about 15 minutes and perform normally — but you'll see multiple reports of the slack.exe process crashing from that time period.
From your computer, press the Win and R keys, then type regedit.exe.
Check for the following keys and add any you don't see: HKEY_LOCAL_MACHINE/SOFTWARE/Citrix/CtxHook> HKEY_LOCAL_MACHINE/SOFTWARE/Wow6432Node/Citrix/CtxHook HKEY_LOCAL_MACHINE/SOFTWARE/Wow6432Node/Citrix/CtxHook64 HKLM/SYSTEM/CurrentControlSet/services/CtxUvi
Make sure slack.exe is listed as the value for each of these keys. When adding slack.exe to keys with other exempted processes, make sure they're separated by a comma.