I'm try to use Mavx Server as a source TM disk for two laptops, also running 10.9. I turn on TM serving, set a folder location for the backup. On the client, I can select this as the TM volume. It asks to connect as a user, guest, or with an AppleID. Whichever one I try, I get a connection error. Do I need to setup a user on the server? When I create a user in Server.app, it doesn't ask me to supply a password for the user. How do I do that?