Modifying users after importing OD from 10.6 to 10.7

Hi,

I have setup a new 10.7 server.

All the services are working nicely and I can't create/change home sharing on new users no problem.

After importing my OD from my old 10.6 server, I cannot make any modification of these users (i.e. group or home folder path). This is true on both workgroup manager and server.

I have tried a few things but nothing has been successful.

Any suggestions out there?

Cheers

Ben