The forest functional level is Windows 2000. To install a Windows Server 2012 R2 domain or domain controller, the forest functional level must be Windows Server 2003 or higher.
The forest functional level cannot be raised because the schema master could not be contacted. Confirm that the schema master ...
The forest functional level cannot be raised to the requested value since one or more domains are still in mixed domain mode. ...
The forest functional level is not high enough to complete addition of application directory partitions during installation ...
The forest functional level is Windows 2000. To install a read-only domain controller, the forest functional level must be ...
The forest functional level is Windows 2000. To install a Windows Server 2012 R2 domain or domain controller, the forest ...
The forest functional levels have been updated to values that are incompatible with the functional level supported by this ...
The forest has an invalid replication authentication mode (msDS-replAuthenticationMode = %1). Replication with the source ...
The forest has an invalid replication authentication mode (msDS-replAuthenticationMode). It requires Kerberos mutual authentication, ...
The forest has an invalid replication authentication mode (msDS-replAuthenticationMode). It uses negotiate pass-through authentication, ...