User Configuration > Administrative Templates > Citrix Components > Citrix Workspace
User
HKCU\Software\Policies\Citrix\ICA Client\Engine\Lockdown Profiles\All Regions
Use this policy to enable or completely disable connections from the Citrix Workspace app.
When this policy is not configured, the client will allow connection to servers.
When this policy is enabled, the client will only connect to a server if the "Enable client" option is selected, and if its version number is greater or equal to the "Minimum client version".
When the policy is disabled, the client will not allow connections to any servers.
Troubleshooting:
If a connection is refused because the client is not enabled, the error message "