AD users with write privileges are not able to delete files on a samba share

Issue

• Samba is using short AD user names with the "winbind use default domain = true" setting in smb.conf.

• Directory permissions are set to 755 on the share folder.

  [root@rhel5 ~]# ls -la /test/
  total 16
  drwxr-xr-x  2 abc xyz 4096 Nov 23 13:24 .
  drwxr-xr-x 26 root    root     4096 Nov 23 13:15 ..
  

• The share in smb.conf uses the force user and group setting.

[test]
    path = /test
    public = no
    writable = yes
    force user = abc
    force group = xyz
    printable = no
    create mask = 0664
    directory mask = 0775
    valid users = @xyz

• Users in "xyz" group can access the share. They can read, modify and create. But they cannot delete.
• Users are part of the default domain in Active Directory(AD).