Can't view license usage on Studio - "Citrix License server unavailable."

When accessing the License Manager web console, error Unsupported Protocol with the message "The client and server don't support a common ssl protocol version or cipher suite" appears.

Follow the below steps to enable only TLS1.2 for TCP port 8083 used by the Citrix Web Services for Licensing service.

1. Run notepad as an administrator and open the following Apache configuration file "C:\Program Files (x86)\Citrix\Licensing\WebServicesForLicensing\Apache\conf\extra\httpd-ssl.conf"
2. Find the line that starts with "SSLProtocol" and put a # at the front to comment it out to save it for future reference.
3. Add the following line above the line you just commented out: SSLProtocol -All +TLSv1.2
4. Restart the "Citrix Web Services for Licensing" service to take effect.

Problem Cause

Citrix Web Services for Licensing was wrongly configured to accept only TLSv1.