What are two primary purposes of a Frame utility Server?

 Frame utility server is a stand-alone, general purpose Windows server that can be helpful for a variety of use cases, including:

License server: Install a network licensing manager for your software on a Frame utility server. Your production instances can then connect to this server to get the licenses.

Backend for a client-server application: Install a database or other backend service on a Frame utility server. Your production instances can then connect to this server to run your client-server application.

Shared file server: Install a file sharing service on a Frame utility server. Your production instances can then access shared files from this server.

Test and develop virtual desktops: Use a Frame utility server as a sandbox environment to test and develop your virtual desktops before publishing them to your production account.

https://docs.frame.nutanix.com/platform/admin/utility-servers/