samba-mirror/docs-xml/smbdotconf/security/passdbexpandexplicit.xml

<samba:parameter name="passdb expand explicit"
                 context="G"
				 type="boolean"
		 xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
<description>
    <para>
	This parameter controls whether Samba substitutes %-macros in the passdb fields if they are explicitly set. We
	used to expand macros here, but this turned out to be a bug because the Windows client can expand a variable
	%G_osver% in which %G would have been substituted by the user's primary group.
    </para>
</description>

<value type="default">no</value>
</samba:parameter>