[Bug 1573221] Re: Regression on 4.3.8 upgrade: clients fail to connect

[Chris Puttick]

Have tried both workarounds listed above, doesn't appear to resolve the
issue.  Setting client use spnego = no does change the error message
though, from:

NT_STATUS_OBJECT_NAME_NOT_FOUND

to

 NT_STATUS_INVALID_PARAMETER

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Title:
  Regression on 4.3.8 upgrade: clients fail to connect

Status in samba package in Ubuntu:
  Confirmed

Bug description:
  Since the upgrade from 4.1.6 to 4.3.8 on our Samba domain controllers
  on Ubuntu 14.04, clients fail to connect. Tested with Windows 7,
  Windows Server 12 and Samba clients.

  $ smbclient -L dc01 -U Administrator
  session setup failed: NT_STATUS_OBJECT_NAME_NOT_FOUND

  In the server logs I see:
      smbd[20632]: [2016/04/21 21:05:43.093606,  1] ../source3/smbd/sesssetup.c:281(reply_sesssetup_and_X_spnego)
      smbd[20632]:   Failed to generate session_info (user and group token) for session setup: NT_STATUS_OBJECT_NAME_NOT_FOUND

  The Windows clients cannot access shares and (quite critically) the
  RSAT tools such as ADUC can't be used to manage the domain.

  May be related to bug #1572301 where issues from other client
  platforms are reported.

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