[Samba] Samba AD/DC, Single-Sign-On, domain users cannot change password

[Rowland penny]

On 14/01/16 05:54, Mark Foley wrote:
> Hmmm, this message is a week old and nothing?
>
> I know many of you have domain member hosts in your domain and surely are logging in as domain
> users authenticating with the Samba4 AD/DC, right?
>
> How do you change your password without having the domain Administrator do it for you?
>
> --Mark
>
> -----Original Message-----
> From: Mark Foley <mfoley at ohprs.org>
> Date: Fri, 08 Jan 2016 12:10:16 -0500
> To: samba at lists.samba.org
> Subject: [Samba] Samba AD/DC, Single-Sign-On,
> 	domain users cannot change password
>
> I have successfully joined my Linux/Ubuntu workstation to the Samaba AD/DC domain thanks to
> help from Rowland Penny.
>
> Now I face an interesting problem ... Domain users cannot change their password.
>
> Domain users can successfully login to the Linux workstation using their domain credentials,
> but when the user tries to change the password using "Passwords and Keys" from the desktop
> utility, it does nothing.
>
> Trying to change the password from a terminal session using `passwd` gives the prompt: "Current
> Kerberos password:" but entering the current domain password is not accepted and the prompt repeats.
>
> If the Domain Administrator set the user's account to "User must change password at next
> login", or if the domain policy expires passwords after so-many days, the user cannot log into
> the Linux workstations -- the display manager login dialog spins for several minutes, then
> shows, "Invalid password, please try again."
>
> This is serious. How does a domain user change his own password?
>
> HELP!
>
> --Mark
>

Using 'passwd' does work, but pam has to be setup correctly and you 
cannot change the password on the first day unless you change the 
minimum password age to '0'

Changing the password at login has nothing to do with Samba (provided 
you can change it from the CLI, see above), it is down to your login 
manager.

Rowland