Hi, tonight I found the solution without reinstalling OS X Mavericks .
After the upgrade , I could not create users in network server 3.0.1.
I solved it .
In my case, I realized that destroying the OD from the configuration panel in Server app , it was still visible in the Utility Directory and in the Users & Groups pane of System Preferences (check Log- In Options: the green light should be on next Sever network account, even after destroying the OD in Server.app) .
I pressed the Edit button next to Server network account and i found Server.local still turned on as Open Directory Service…
I suggest to do so, it worked for me:
DESTROY THE OPEN DIRECTORY IN SERVER.APP (YOU CAN ARCHIVE, BUT YOU WILL HAVE TO CREATE A FULLY NEW OPEN DIRECTORY ANYWAY).
TURN OFF THE OPEN DIRECTOTY SERVICE.
DELETE ALL DNS RECORD : ALL RECORDS AND ALL ZONES! DO NOT TURN OFF THE SERVICE!
OPEN UTILITY DIRECTORY (IN SYSTEM PREFERENCES OR DIRECTLY FROM SERVER . APP).
TO EDIT, LOG IN AS ADMINISTRATOR BY PRESSING THE USUAL PADLOCK ON BOTTOM LEFT CORNER OF THE PANEL AND CLICK TWICE ON LDAPv3.
YOU SHOULD FIND THE DIRECTORY STILL IN THE LIST! (SHOULD BE 127.0.0.1 AS DEFAULT) IS IT SO? SELECT AND DESTROY!!!
GO BACK TO SERVER.APP AND CREATE A NEW DOMAIN. FOR EXAMPLE :
COMPUTER NAME: SERVER.LOCAL
HOST NAME : SERVER.MYDOMAIN.PRIVATE
I HAVE A VPN. TO BE SURE, I MATCHED COMPUTER NAME AND HOST NAME.
IN MY CASE : "SERVER" AND I LEFT THE SAME IP THAT I HAD BEFORE .
FOLLOW ALL THE STEPS FOR THE CREATION OF THE NEW DOMAIN AS SUGGESTED BY SERVER.APP, INCLUDING THE UPDATE OF DNS SERVICE.
AFTER THIS STEP, AS USUAL, SERVER.APP GENERATES A NEW ALERT.
CHECK THE ALERT SERVICE IN THE SIDEBAR: “THE HOST NAME IS CHANGED”.
DOUBLE CLICK ON ALERT AND CLICK THE "RECOVERY" BUTTON.
THE GREEN CONTROL SIGN SHOULD APPEAR, AFTER SERVICES UPDATING.
CHECK THE DNS: SERVER.APP CREATED THE PRIMARY AND SECONDORY ZONES WITH THE NEW NAME SERVER AND THE COMPUTER, EVEN IN THE REVERSE ZONE.
NOW ACTIVATE OPEN DIRECTORY SERVICE.
IT SHOULD START FROM SCRATCH AND FULL FUNCIONALLY.
YOU CAN CREATE A NEW ADMINISTRATOR ACCOUNT AND EVERYTHING GOES.
PLEASE, LET ME KNOW IF IT WORK FOR SOMEBODY ELSE.
THANK YOU