[Samba] Win2003 DC fails to detect Samba 4 DC

[Garth Keesler]

I have an (apparently) valid Samba4 DC to which I have transferred all 
FSMO roles in preparation for running dcpromo and demoting the Win DC. 
All of the logs look good on the Samba DC and showrepl indicates no 
errors. Unfortunately, the Win DC does not seem to detect the Samba DC 
when I attempt to run dcpromo and it throws a nasty warning about AD 
data being lost. If I run Sites and Services, both DCs show up and are 
viewable. Also, in Users and Computers, both DCs correctly show up in 
Domain Controllers.

Not sure what to do next. Help appreciated.

Thanx,
Garth