...
After entering the server-specific settings in this section, you can click the "Test ServerConnection" button at the top bottom right of the section page to test the server connection and authentication.
A window will pop up showing a success or failure response.
...
In the last section, select a default Group to be associated with the server. Zones assigned to the selected Group will automatically be attached to the server.
4) Save Changes
Save your changes when done! Just click the "Save Changes" button at the bottom right of the page.
The new server will now be added to the DNS Servers list. These settings may be changed at any time by selecting the server from the server list and editing the information.
...