This was the error when i tried to join win2k12 to DC on win2k8
"ADPrep execution failed --> Microsoft.DirectoryServices.Deployment.ADPrepLdapException: No Such Object. Server extended error: 8333. Server extended message: 0000208D: NameErr: DSID-031001E4, problem 2001 (NO_OBJECT), data 0, best match
of:
'CN=Schema,CN=Configuration,DC=domain,DC=com'.
ADPREP was unable to modify the default security descriptor on object CN=ms-DS-Managed-Service-Account,CN=Schema,CN=Configuration,DC=domain,DC=com.
[Status/Consequence]
Adprep attempts to merge the existing default security descriptors with the new access control entry (ACE).
[User Action]
Check the log file ADPrep.log in the C:\Windows\debug\adprep\logs\20130505210218 directory for more information."
-repadmin /showrepl all fine
-check object version its 56
Need Help thanks before