When attempting to redirect your On-Prem StoreFront URL to your new Cloud Workspace URL,
It works successfully when you use the Web Browser as the URL correctly redirects to your new URL.
-> But you encounter issues with Citrix Workspace App not redirecting to the new URL

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The following settings must be used for the URL redirection to work with CWA for Windows,
Replace the Storefront On-Prem URL to the new Cloud URL + uncheck boxes + select "301"
-Do the same on ALL StoreFront servers

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Problem Cause

Incorrect settings used to allow the URL redirection to work as expected

https://docs.citrix.com/en-us/citrix-workspace-app-for-windows/about.html#whats-new-in-2105

What’s new in 2105

Support for customized URLs through 301 redirects

Citrix Workspace app now allows you to add URLs that redirect to Citrix Workspace from StoreFront or Citrix Gateway through HTTP 301 redirects.

If you’re migrating from StoreFront to Citrix Workspace, you can redirect the StoreFront URL to a Citrix Workspace URL through an HTTP 301 redirect. As a result, when adding an old StoreFront URL, you’re automatically redirected to Citrix Workspace.