• Host To Client Redirection is enabled and, the VDA Default Browser is opening Internet Explorer instead of Edge or Chrome.
• The ServerFTAHTML is set up to open Edge or Chrome however, it is always rewritten to open Internet Explorer after VDA reboot.

• HKEY_CLASSES_ROOT\http\shell\open\command_backup
• Value: Default (REG_SZ)
• Data: "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" %1 or "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" %1

• HKEY_CLASSES_ROOT\https\shell\open\command_backup
• Value: Default (REG_SZ)
• Data: "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" %1 or "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" %1

Problem Cause

• VDA Default Browser Configuration Issue
  • Host to client redirection: https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/1912-ltsr/general-content-redirection/host-to-client-redirection.html
  • Server VDA default browser configuration: https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/policies/reference/hdx-registry-settings.html#server-vda-default-browser-configuration

• Citrix Product Matrix > https://www.citrix.com/support/product-lifecycle/product-matrix.html
• Supported Hypervisors for Citrix Virtual Apps & Desktops and Provisioning Services: https://support.citrix.com/article/CTX131239
• Microsoft Lifecycle Policy > https://docs.microsoft.com/en-US/lifecycle/