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GoogleFuMaster-7013 avatar image
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GoogleFuMaster-7013 asked DSPatrick commented

Cannot add promote second server to DC. Error 1326

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-active-directorywindows-server-2012
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DSPatrick avatar image
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DSPatrick answered DSPatrick commented

Something here may help.
https://docs.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.



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Just checking if there's any progress or updates?

--please don't forget to upvote and Accept as answer if the reply is helpful--



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LimitlessTechnology-2700 avatar image
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LimitlessTechnology-2700 answered

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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LimitlessTechnology-2700 avatar image
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LimitlessTechnology-2700 answered DSPatrick commented

Hello again @GoogleFuMaster-7013

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

Hope this helps with your query,
Best regards,

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Server 2 was originally our second DC, but it had tombstoned due to a local outage in our remote office.

I've checked FSMO roles within Server1 and they are all pointing correctly to itself. Server2 does not have any roles.

I've reset the DSRM password on Server1, but cannot do so on Server2.

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cthivierge avatar image cthivierge GoogleFuMaster-7013 ·

Have you done a Meta data cleanup after the DC get tombstoned ?

Does the DC you want to promote has the same name as the previous tombstoned DC ?

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Yes, I've performed Meta data cleanup.

I've changed the server name as well.

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cthivierge avatar image
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cthivierge answered GoogleFuMaster-7013 commented

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

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Server2 is already a member of the domain.

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