User can not login when particular DC down

Md. Rubiat Haque 146 Reputation points
2022-10-17T13:11:05.323+00:00

Hi, I have 3 Domain Controller. DC1, DC2 & DC3. All fsmo roles are placed in DC1. When DC2 is shutting down, no users can login. What's the issue. Please suggest me any solution. Thanks in advance.

Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
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Windows DHCP
Windows DHCP
Windows: A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.DHCP: Dynamic Host Configuration Protocol (DHCP). A communications protocol that lets network administrators manage centrally and automate the assignment of Internet Protocol (IP) addresses in an organization's network.
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  1. Dave Patrick 426.2K Reputation points MVP
    2022-10-17T13:18:32.75+00:00

    I'd check the DHCP server is handing out an alternate domain controller / DNS server address.

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

    1 person found this answer helpful.

  2. Cedric NONOGNI 161 Reputation points
    2022-10-17T14:31:37.453+00:00

    Hi @Md. Rubiat Haque
    Is there a chance that your DC2 is configured as dns server on your clients computer?
    If yes adding a secondary one would fix it, since it is through the dns server that the client are aware of lot of things.
    It will be good to double check on fsmo role distribution (I guess you did that already :) )
    Also, there isn’t any specific ad site configuration ?

    If what I just said don’t help, you should check in computer events log to see exactly what is logged when the login fail you will have valuable informations.

    Regards.


  3. Dave Patrick 426.2K Reputation points MVP
    2022-10-18T13:31:12.583+00:00

    Thanks for your response. There is no DHCP server in my environment.

    Then this just means it will be a manual process to update the members with an alternate domain controller / DNS server address on connection properties.

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


  4. Md. Rubiat Haque 146 Reputation points
    2022-10-23T04:11:42.687+00:00

    Dear all,

    Thanks for your support. At last my issue has been resolved now. The issue occurred because here only on domain controller promoted as a global catalog. Rest of the domain controllers were not promoted as a global catalog properly. After promoted those domain controllers as a global catalog successfully, the issue had been resolved.