I have the exact problem described here:
http://khellman.blogspot.com/2014/02/ad-ds-operation-failed-dcpromo-error.html
I went to demote an old 2008 R2 Domain Controller and got the : The directory service is missing mandatory configuration information, and is unable to determine the ownership of floating single-master operation roles.
Our Active Directory supports the operation of a large school district, and with the current situation, It would be most problematic to beak AD, although the current situation is obviously broken as it points to a DC that does not exist.
If I query the fsmo roles from NetDom, they are correct, but apparently, It's not the same thing as the DNS Zones
I just want to make sure that creating these changes are non destructive and safe to implement.
Thanks