[Samba] Permission issue writing to demo share

[Lars Hanke]

I created a demo share on my AD DC. After obtaining a copy of Win7 
Ultimate I could now verify that the share has all rights granted to 
anyone (don't know how Windoze call "Jeder" in English).

I can read and write the Share using AD\Administrator. AD\StandardUser 
can mount the share and read, what the Administrator put there. But he 
cannot create or modify files.

AD\StandardUser was created using samba-tool following the Wiki Howto.

Is there a howto to systematically troubleshoot permission stuff? I fear 
it won't be my last time lost in AD.

Regards,
  - lars.