samba - May 2017 - samba-tool cannot add or remove group members

Hi

samba-tool group addmembers stage user
ERROR(exception): Failed to add members "user" to group
"stage" - Unable to find "user". Operation cancelled.
  File "/usr/lib/python2.7/dist-packages/samba/netcmd/group.py", line
227, in run
    add_members_operation=True)
  File "/usr/lib/python2.7/dist-packages/samba/samdb.py", line 274, in
add_remove_group_members
    raise Exception('Unable to find "%s". Operation
cancelled.' % member)

net rpc group addmem stage user -UAdministrator
>ok, user added
samba-tool group removemembers stage user
>error
net rpc group delmem stage user -UAdministrator
> ok user deleted
I remember that I provisionned my domain few weeks ago with samba-tool without
problem!
This command does not work anymore for another user, or for other groups...

What's the problem? I'm on debian 9, samba 4.5.8
I read some similar problem on the list
https://www.spinics.net/lists/samba/msg142240.html, but I did not help me

Best regards, 

Sébastien QUESSON

On Mon, 29 May 2017 21:51:15 +0200 (CEST)
Sébastien QUESSON via samba <samba at lists.samba.org> wrote:
> Hi
> 
> samba-tool group addmembers stage user
> ERROR(exception): Failed to add members "user" to group
"stage" -
> Unable to find "user". Operation cancelled. File
> "/usr/lib/python2.7/dist-packages/samba/netcmd/group.py", line
227,
> in run add_members_operation=True) File
> "/usr/lib/python2.7/dist-packages/samba/samdb.py", line 274, in
> add_remove_group_members raise Exception('Unable to find
"%s".
> Operation cancelled.' % member)
> 
> net rpc group addmem stage user -UAdministrator
> >ok, user added
> 
> samba-tool group removemembers stage user
> >error
> 
> net rpc group delmem stage user -UAdministrator
> > ok user deleted
> 
> I remember that I provisionned my domain few weeks ago with
> samba-tool without problem! This command does not work anymore for
> another user, or for other groups...
> 
> What's the problem? I'm on debian 9, samba 4.5.8
> I read some similar problem on the list
> https://www.spinics.net/lists/samba/msg142240.html, but I did not
> help me
> 
> Best regards, 
> 
> Sébastien QUESSON
> 
would you be trying to add the user to the group like this:

samba-tool group addmembers unixgroup "SAMDOM\user1"

If so, try it like this:

samba-tool group addmembers unixgroup suser1

Rowland

samba-tool group addmembers domaingroup 'SAMDOM\user1'
ERROR(exception): Failed to add members "SAMDOM\user1" to group
"domaingroup" - Unable to find "SAMDOM\user1". Operation
cancelled.

samba-tool group addmembers 'SAMDOM\domaingroup' 'SAMDOM\user1'
ERROR(exception): Failed to add members "SAMDOM\user1" to group
"SAMDOM\domaingroup" - Unable to find group
"SAMDOM\domaingroup"

samba-tool group addmembers localgroup 'SAMDOM\user1'
ERROR(exception): Failed to add members "SAMDOM\user1" to group
"localgroup" - Unable to find group "localgroup"