We alredy migrated all the DCs of a domain, from Windows 2003 to Windows 2012-R2. Now we want to rise the domain and the forest to Windows 2012-R2. We already reviewd that all sites have only Windows 2012-R2 DCs. We alredy review in DNS that there is not old records related to previous Windows 2003 DCs. If trying to rise the forest level from the AD Administrative Center, it says it is not possible to rise because the domain includes old DCs, same for forest rise. Both offeres option save as, but the files generated do not says wich is the old DC. When using AD Domain and trusts, for forest rise, we get the error: The NTDS-DSA object CN=NTDS Settings, CN=LostandFoundConfig,CN=C
main name... is not properly configured and is preventing the forest functional level from being raised. It refers to the DC xxx ... Delete this object using the ADSI Edit. I looked in the metadata through ntdsutil, but the site refered does not existe, neither the DC. In the LostAndFound recipient, there is no reference to that object. If I look with ADSI Edit, in the configuration context, in CN=LostAndFpoundConfig, it is the entry for CN=NTDS Settings, if I view the properties, in the Atribute lastknownParent, it refers to the names DC xxx. Is it possible (safe) to delete this entry directly in the ADSIEdit? or how can I update this last object so it does not refer to the old DC? (I do not know if this entry (CN=NTDS Settings) inside the path specified is a neccesary entry that should be updated insted of deleted).