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M_i_g_u_e_l's avatar
M_i_g_u_e_l
Copper Contributor
Apr 23, 2026
Solved

AD Replication Error 1908 (Source DSA)

Hi all, I’m troubleshooting an Active Directory replication issue (error 1908 – “Could not find the domain controller”) in a multi-site environment with 16 domain controllers across multiple locatio...
Active Directory
windows server
  • M_i_g_u_e_l's avatar
    M_i_g_u_e_l
    May 22, 2026

    Thank you Mister_K​ and Josy_O​ for your responses. 

    The root cause of the issue was not A-DC (Main-DC); it was a read-only DC that had broken DFSR/SYSVOL replication. This DC was showing 100% replication failure (6/6), but I focused on the main DC and overlooked the problematic one.

    I demoted and shut it down since it was going to be replaced eventually. After that, the domain looks healthy and replication is working properly again.

Mister_K's avatar
Mister_K
Copper Contributor
Apr 26, 2026

Hello Miguel,
Ok, for this kind of issue, i can see there's some errors with the KDC. It's either the target KDC or the A-DC itself which is experiencing some issues. So :

  1. : Make sure the KDS (Key Distribution Service) is running on the Domain Controller (the right one, KDC)
  2. Please, can you lookup in to the logs Event ID : 1925,1926, 1943 and 1125 .
  3. And check this out , it might help : 

    https://learn.microsoft.com/en-us/troubleshoot/windows-server/active-directory/ad-replication-error-1908-not-find-domain-controller

 

Best .