https://bugs.winehq.org/show_bug.cgi?id=55304
--- Comment #3 from Dmitry Timoshkov dmitry@baikal.ru --- (In reply to Hans Leidekker from comment #1)
I have replaced QueryContextAttributesA(SECPKG_ATTR_KEY_INFO) with QueryContextAttributesA(SECPKG_ATTR_SESSION_KEY) after implementing the attribute for Kerberos and NTLM.
According to my testing Kerberos implementation under Windows 10 returns SEC_E_UNSUPPORTED_FUNCTION for QueryContextAttributes(SECPKG_ATTR_SESSION_KEY). What Windows version are you testing with?