[Samba] Problem after update version 4.15.0

[Rowland Penny]

On Tue, 2021-10-05 at 19:47 +0200, Ingo Asche via samba wrote:
> Hi All,
> 
> I can second the problem. After Updating to 4.15 I also can't login
> to 
> my AD. After reverting to 4.17.7 all works again without any
> problems.
> 
> For testing I set up an AD DC already with 4.15. I could join with a 
> Windows 10 PC.
> 
> Login with Administrator of domain works. Then I created a standard
> user 
> with option "Change password on first login".
> 
> Now comes the funny thing: On first login with this user I was ask
> to 
> change the password which worked. But after this I get a "password
> or 
> user wrong".
> 
> So that's the case now: Login with Administrator works on the 4.15
> test 
> domain but not with the standard user.
> 
> Ingo Asche
> 

Is there anything in either the Samba or auth logs on the Samba DC ?
If not, can you raise the log level to see if anything pops out.
Have you also checked the client logs ?

Rowland