The alert "Citrix Virtual Apps and Desktops Warning: Your corporate Citrix environment is currently unsupported.  Please contact your IT department to resolve." is shown when starting the session.

No expired license file is stored on the license server.

Clear the cache of the Licensing Server using the following steps.

1. Stop Citrix Licensing Service on the Licensing Server.

2. Back up all files under the below path.
・64bit: C:\Program Files (x86)\Citrix\Licensing\LS\resource\cache
・32bit: C:\Program Files\Citrix\Licensing\LS\resource\cache

3. Delete all files in the cache folder.

4. Restart Citrix Licensing Service on the Licensing Server.

5. Restart the Citrix Broker Service on all DDC / Broker servers (or restart every DDC-server).

Problem Cause

License cache

Citrix License Warning - Your corporate Citrix environment is currently unsupported.
https://support.citrix.com/s/article/CTX587662-citrix-license-warning-your-corporate-citrix-environment-is-currently-unsupported?language=en_US