Mavericks Server /Work group manager issues
SOLVED FOR ME.

I don't recall seeing this before in Snow leopard (the interface was slightly different...), on the same line at the message "Viewing local directory /Local/Default. Not Authenticated." there is a small triangle --- clicking on this reveals a drop menu.

Select LDAPv3 from the list.  Then click on the lock at the far end of that bar. 
Authenticate as DIRADMIN and it works.