Bind to OD using Terminal 10.7

I am trying to bind multiple machines using terminal to my Open Directory.

The command:

sudo dsconfigldap -sa "servername" -n "servername" -S works but not through ARD because it asks me if I wish to accept the certificate provided by the server. Does anyone know the switch to automatically accept? With mavericks I just used -N at the end, but this does not work with Lion Server.

Any thoughts are appreciated. Thank you.