[Samba] Winbind / Samba auth problem after username change

[Julian Zielke]

Hi,

before we switched to SSSD we've been implementing the ssh authentication method via Domain using winbind+samba.
Version installed on our machines is (still) 2:4.1.6+dfsg-1ubuntu2.14.04.13. So far everything has been working fine, however
after we had to change a user's logon name in the domain he can't login anymore. auth.log shows still his old username followed by "from <IP> not allowed because none of user's groups are listed in AllowGroups". I searched several websites for a solution but only found recommendations on deleting
the winbind cache at /var/lib/samba. However this didn't fix the problem. When I do a grep using getent passwd on the users NEW name, it shows up.
So actually the domain controllers is delivering the correct username.

Is this a known bug in version 4.1.6 or can I solve this any other way without running a package upgrade on a production machine?

Cheers
Julian

Wichtiger Hinweis: Der Inhalt dieser E-Mail ist vertraulich und ausschlie?lich f?r den bezeichneten Adressaten bestimmt. Wenn Sie nicht der vorgesehene Adressat dieser E-Mail oder dessen Vertreter sein sollten, so beachten Sie bitte, dass jede Form der Kenntnisnahme, Ver?ffentlichung, Vervielf?ltigung oder Weitergabe des Inhalts dieser E-Mail unzul?ssig ist. Wir bitten Sie, sich in diesem Fall mit dem Absender der E-Mail in Verbindung zu setzen. Wir m?chten Sie au?erdem darauf hinweisen, dass die Kommunikation per E-Mail ?ber das Internet unsicher ist, da f?r unberechtigte Dritte grunds?tzlich die M?glichkeit der Kenntnisnahme und Manipulation besteht

Important Note: The information contained in this e-mail is confidential. It is intended solely for the addressee. Access to this e-mail by anyone else is unauthorized. If you are not the intended recipient, any form of disclosure, reproduction, distribution or any action taken or refrained from in reliance on it, is prohibited and may be unlawful. Please notify the sender immediately. We also would like to inform you that communication via e-mail over the internet is insecure because third parties may have the possibility to access and manipulate e-mails.