"Windows is unable to calculate effective permissions for blah" against a standalone Samba server

Matthieu Patou mat at samba.org
Thu Nov 3 09:45:05 MDT 2011

On 03/11/2011 15:51, Richard Sharpe wrote:
> Hi folks,
> Has anyone seen this? Standalone Samba 3.5.6 with the tdb backend being tdbsam.
Yes, and also with samba4 as a DC.
> On Win2K03 (at least) right click on a file, select permissions, click
> advanced and select effective permissions.
> No matter what user is entered, Windows complains that it is unable to
> calculate the effective permissions for that user.
> I have looked at a capture of the traffic and there are seemingly no
> errors (werror == SUCCESS all the time) so maybe some group
> memberships are empty or something.
> I guess my next step would be to snoop the traffic between two Windows servers.
Could be interesting to get an information from Microsoft.

Matthieu Patou
Samba Team

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