By default, this right is granted to members of the Administrators security group in the target domain. The built-in Administrator account is a member of this security group but may have been removed.
Verify that the default domain controllers policy is linked to the domain controllers OU and that all DC machine accounts stay in that OU.
If DC machine accounts stay in an alternate OU container, either move all DC machine accounts to the domain controllers OU or link the default domain controllers policy to the alternate OU container.
Verify that the file system portion of default domain controllers policy exists in the SYSVOL share of the DC being used to apply policy on the computer being promoted or demoted. Typically seen when returning the DNS Delegation warning. Do not run than one instance of domain controller promotion at the same time for the same target computer. You cannot demote this domain controller, as it is also a Certification Authority.
Do not remove the CA before you carefully inventory its usage - if it is issuing certificates, removing the role will cause an outage. Running CAs on domain controllers is discouraged. Free up space using cleanmgr. Provide a password for the DSRM account, it cannot be blank no matter how the password policy is configured. Provide a password for the local administrator account that meets the password policy's configured rules.
During demote, last domain controller was detected even though it is not, or last domain controller was specified, but it is not. Do not specify Last Domain Controller in the Domain -lastdomaincontrollerindomain unless it is true. Use -ignorelastdcindomainmismatch to override if this is truly the last domain controller and there is phantom domain controller metadata.
Specify to Remove Application Partitions -removeapplicationpartitions. Required command-line argument is missing that is, an answer file must be specified on the command-line. Raise the forest functional level to at least Windows Server Native.
Windows and Windows NT 4. Examine the extended error and logs; the server is failing to return its operating system version. It is likely that the computer will need to be re-installed, as its overall health is highly suspect. Use repadmin. Use netstat. You cannot promote this domain controller, as it is also a RDS server configured for more than two admin users.
Do not remove RDS before you carefully inventory its usage - if it is being used by applications or end-users, removal will cause an outage. Validate that you have typed in valid domain and user accounts when specifying a password replication policy.
Returned if you specify "Use Existing Account" but either no account found or there is an error during account lookup. Ensure you provided the correct RODC staged account. Returned if you promote an additional domain controller but an existing account exists and "Allow Reinstall" was not specified.
Rename the computer before promoting, if not trying to attach to an unoccupied domain controller. You must attach to the unoccupied domain controller account using -useexistingaccount and the correct read-only or writable argument, depending on account type. You specified an invalid account for RODC admin delegation. Verify that the account specified is a valid user or group.
Use netdom. Bring it online and make it accessible to the domain controller you are promoting. Raise the forest functional level to at least Windows Server native.
Raise the domain functional level to at least Windows Server native. Remember to point the DNS client to another server than itself. If using Windows PowerShell, run the following after you demote the server: Code - uninstall-windowsfeature dns or Code - set-service dns -starttype disabled stop-service dns.
Set these values using the Netlogon and DNS group policies. Demotion fails with message: Dcpromo. Run adprep. Error returned: Code - Could not validate media path. If using Dism. The specified domain functional level is invalid.
I spent today verifing the adprep worked correctly. Any ideas? I about to reformat the computer, install 64 bit, dcpromo, then upgrade it to R2. However this is a messy way to install a fresh OS. Will it freak out if I ever have to add and remove the DC role?
Am I looking at unistalling R2 at this point? Forest Structure: TopLevel. Office Office Exchange Server. Download Microsoft Edge More info. Contents Exit focus mode. Please rate your experience Yes No. Any additional feedback?
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