More information is needed. That FAQ article describes testing things in their browser. What is the result of that? Is wyday.com blocked? Then you've found the solution: unblock wyday.com.
If they can't unblock wyday.com either due to faulty policies or old technology (e.g. firewalls that don't support domain names, but only support IP addresses), then the customer can always offline activate: https://wyday.com/limelm/help/offline-activation/
>> "Could you please let me know the IP address of TurboActivate license server (used for activating a trial license)?"
Nope. Our IP address is behind reverse proxies. This is a security feature. It's not static and it changes based on where in the world you are.
Use the domain name it *is* static. Unblock "wyday.com". Modern firewalls (software and hardware) support whitelisting domain names. If their firewall doesn't support that then they should take steps to work with current technologies.