Issue.
Background - During installation I have installed Citrix License server component on Delivery controller, as port to my license server was not opened and its a requirement to point License server during installation of Delivery controller.
No i want to point back to my production Citrix License server.
Ports - 27000, 8083,7279 are open , however i was getting above mentioned error.
Resolution -
Uninstall License server from Delivery controller and the change license server.