Window 11 24H2 / Can’t Join Domain

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https://answers.microsoft.com/en-us/windowserver/forum/all/window-11-24h2-cant-join-domain/0e418272-f9e8-4cdf-b195-22fe75f2a967?page=6

I HAVE BEEN PULLING MY HAIR OUT FOR THE LAST TWO DAYS.

With the knowledge from this thread of comments:

Yes the win 11 24H2 updates does not let you join a single label domain.

I adopted a single label domain when joining the company and adding devices to the domain has NEVER been a huge issue until two days ago when imaging a brand new laptop from dell for office staff.

The thing that let me to success was seeing the registry edit suggestions. I didn’t think that was necessary at first so i kept troubleshooting and troubleshooting, going crazy in the end so then finally I added a registry key and i finally got the prompt for credentials.

I almost threw the laptop across the room. Special thanks to AI/GPT and the users in this thread. Anyway here is the special sauce:

To join a Windows 11 computer to a single-label domain, you need to access the system settings, navigate to „Computer name, domain, and workgroup settings“, select „Domain“ as the membership type, and enter the full single-label domain name, but be aware that this configuration is not recommended due to potential compatibility issues and may require additional registry adjustments to enable single-label domain resolution on the computer; you might need to create a DWORD value called „AllowSingleLabelDnsDomain“ in the registry with a value of „1“ to allow joining a single-label domain. 

Key points to remember:

  • Not recommended:Single-label domains (SLDs) are generally not recommended due to potential issues with DNS resolution and compatibility with certain applications. 
  • Registry modification:To join an SLD, you might need to manually edit the registry on the computer to enable single-label DNS resolution by creating the „AllowSingleLabelDnsDomain“ DWORD value. 

How to join a single-label domain:

  1. Open System Settings: Go to Start menu, then select „Settings“ > „System“ > „About“. 
  2. Access Computer Name: Click on „Change“ under „Computer name, domain, and workgroup settings“. 
  3. Select Domain: Choose „Domain“ as the membership type. 
  4. Enter Domain Name: Enter the full single-label domain name (e.g., „example“). 
  5. Registry Modification (if necessary):
    • Open the Registry Editor. 
    • Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters. 
    • Create a new DWORD value called „AllowSingleLabelDnsDomain“ and set its value to „1“. 

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