Preferred Server List dialog box

The Preferred Server List applies only for an Exchange 2010 Database Availability Group (DAG) environment. In this dialog box you indicate the nodes in a DAG that you want to be your preferred servers to perform a backup.

Name	Provide the name of the server you want to add to the list.
Add	Click Add to add the name of the server you provided in the Name box to the list.
Remove	Removes the selected server(s) from the list.