[Samba] Access to Samba-Shares with "sign communications = mandatory"

[d.guthmann at gmx.net]

Hello Samba-Specialists,

which smb.conf-options do I have to set to get access to a Samba-Share from a Windows7-Machine, if the Windows7-Machine is very restrictive configured regarding 'smb-signing'?

Windows7-Configuration:
Microsoft network client: Digitally sign communications (if server agrees): Enabled
Microsoft network client: Digitally sign communications (always): Enabled
Microsoft network server: Digitally sign communications (if client agrees): Enabled
Microsoft network server: Digitally sign communications (always): Enabled

The following Settings in smb.conf does not work :-(
server signing = mandatory
client signing = mandatory
server schannel = auto
client schannel = auto

Thanks in advance.

Rgds
Dieter