UNIX nobody/nogroup mapping to which Windows SID/account?

[Martin Wege]

Hello,

How can we map UNIX "nobody"/"nogroup" to Win32 SIDs/accounts? Cygwin
has entries for "nobody" in /etc/passwd and "nogroup" in /etc/group,
but these accounts have SIDs returned by /usr/bin/getent passwd and
/usr/bin/getent group which LookupAccountSidA() does not recognise.

So what is the correct Win32 solution?

Thanks,
Martin