[Samba] Windows 11 24H2, Samba 4.21.3 AD DC and domain users cannot log in

[Rowland Penny]

On Tue, 4 Feb 2025 15:07:30 +0200
Virgo Pärna via samba <samba at lists.samba.org> wrote:

> And there has been some developement...
> 
> test-computersecurechannel
> still reports True.
> But now
> test-computersecurechannel -repair
> now fails with
> "Test-ComputerSecureChannel: Cannot reset the secure channel password 
> for the computer account in the domain. Operation failed with the 
> following exception: The user name or password is incorrect."
> 
> test-computersecurechannel -repair -Credential DOMAIN\Administrator 
> -Server dc.domain
> also fails with same message.
> 
> But
> test-computersecurechannel -repair -Credential DOMAIN\Administrator 
> -Server ip_of_dc
> succeeds...
> 

that may point a way to the problem, using a fqdn will probably use
kerberos and using the IP will probably use rpc. If that is the case,
then there is probably a kerberos problem and doing a search on that,
turned up this;

https://nuangel.net/2025/01/windows-11-24h2-insufficient-system-resources-trying-to-login/

Check that, it may be your problem.

Rowland