[Samba] Unable to join domain by using NetJoinDomain on Windows

[Jeremy Allison]

On Mon, Oct 22, 2018 at 04:18:35PM +0800, 周永健 via samba wrote:
> Hello,
> 
> I am using samba 4.8.6 and 4.9.1 to build a domain. And I have a Windows 7
> virtual machine to join the domain. However, I found it was fail when I
> used the NetJoinDomain which is the C# Library on Windows.
> I am using the Unsecure option, authenticating by the machine password. And
> Here is my code
> 
> int ret = NetJoinDomain(null, myDomainName, null, null, myMachinePassword,
> (JoinOptions.NETSETUP_JOIN_DOMAIN | JoinOptions.NETSETUP_JOIN_UNSECURE |
> JoinOptions.NETSETUP_DOMAIN_IF_JOINED |
> JoinOptions.NETSETUP_MACHINE_PWD_PASSED));
> 
>  It was successfully on samba 4.5.16. I used the same method to join the
> domain previously but it doesn’t work after I upgraded samba to 4.8 above.
> The return code is 1326 which said that UNKNOWN USERNAME OR INCORRECT
> PASSWORD.
> 
> 
> Does anyone have the idea about this issue?

Can you post a wireshark trace of the join failing ?