TLS v1.0 is disabled by default on vIDM v2.6 onward, the following will illustrate how to re enable it. First log onto the appliance using the root user. Using a vi editor open the following location.

>vi /opt/vmware/horizon/workspace/conf/server.xml

Then find the following line.

>sslEnabledProtocols=”TLSv1.1,TLSv1.2″

This needs to be changed to the following.

>sslEnabledProtocols=”TLSv1,TLSv1.1,TLSv1.2″

It also needs to be changed in a second location.

Once changed do a save ad quit. Then restart the services by running.

>/etc/init.d/horizon-workspace restart

Make sure the status comes back as RUNNING

VMware’s KB can be found here.