Cannot add promote second server to DC. Error 1326

GoogleFuMaster 1 Reputation point
2021-09-15T04:38:21.677+00:00

Server1.contoso.com = Main DC
Server2.contoso.com = Server that I would like to promote to a DC to replicate any changes made to Server1

Both are running Windows Server 2012 R2 Standard.

When I try to run the DCPromo, I receive the following errors below. Any ideas where I can start to troubleshoot? I am able to ping server1 from server2 without any issue.

Verification of prerequisites for Active Directory preparation failed. Unable to connect to the replication source domain controller server1.contoso.com..
Exception: A directory service error has occurred

Verification of prerequisites for Domain Controller promotion failed. Failed to examine the Active Directory forest. The error was: The operation cannot continue because LDAP connect/bind operation failed: error: 1326 (The user name or password is incorrect.).

Verification of outbound replication failed. Unable to locate replication source domain controller server1.contoso.com. Domain controller "server1.contoso.com" does not exist or cannot be contacted.

Windows Server 2012
Windows Server 2012
A Microsoft server operating system that supports enterprise-level management, data storage, applications, and communications.
1,526 questions
Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
5,836 questions
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4 answers

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  1. Dave Patrick 426.1K Reputation points MVP
    2021-09-15T12:51:41.347+00:00

    Something here may help.
    https://learn.microsoft.com/en-us/troubleshoot/windows-server/identity/ad-replication-error-1908-not-find-domain-controller

    also please run;

    Dcdiag /v /c /d /e /s:%computername% >C:\dcdiag.log
    repadmin /showrepl >C:\repl.txt
    ipconfig /all > C:\dc1.txt
    ipconfig /all > C:\dc2.txt

    then put unzipped text files up on OneDrive and share a link.

  2. Limitless Technology 39,341 Reputation points
    2021-09-15T14:22:57.18+00:00

    Hello,

    Thank you for reaching out.

    1. Please verify you have Admin privileges so that you can join to Domain.
    2. Please verify DNS settings and DNS ip should of your DC server.
    3. Please try to disable firewall and anti-virus program for temporary.

    Hope this helps.

    Regards

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  3. Limitless Technology 39,341 Reputation points
    2021-09-15T15:07:06.477+00:00

    Hello again @GoogleFuMaster

    Besides checking that the user/password is correct and has Domain Admin privileges, I would recommend:

    Hope this helps with your query,
    Best regards,

  4. cthivierge 4,056 Reputation points
    2021-09-18T13:58:43.803+00:00

    Does server2 is already member of the contoso domain before promote it to a DC?