a 10.3 client won’t use a 10.2 server as a netinfo server to provide authentication and managed desktop services.
In directory access, enable netinfo, and specify the ip address of the server. give it the tag “network.” Uncheck dhcp and broadcast. Authentication should be automatic.
In the netinfo manager, add the dir: /machines/server
add these properties:
ip_address: [ip address of server]
reboot, and it should work.