Create MSSQL AG Client
Use this dialog box to create a SQL Availability Group (AG) client.
Type the name for the Availability Group client you are creating. The name of the AG client has no dependency on the actual availability groups.
Select a client from the list displaying SQL 2012 or later clients. Ensure that the selected SQL Server is the primary replica of the availability group that you are planning to protect.
Select an instance from the list of available SQL instances. If the SQL client has only one instance, then that instance is automatically selected.
Select an availability group from the list. If the SQL client has only one availability group, then that availability group is automatically selected.