commit 989793af3151fca03f6913c1234c2642b265b231
Author: Derek Schrock <dereks@lifeofadishwasher.com>
Date:   Sun Apr 17 18:42:53 2016 -0400

    Only Validate MIC if "map to guest" is not Never

diff --git a/auth/ntlmssp/ntlmssp_server.c b/auth/ntlmssp/ntlmssp_server.c
index 17d5ade..2eaa27d 100644
--- a/auth/ntlmssp/ntlmssp_server.c
+++ b/auth/ntlmssp/ntlmssp_server.c
@@ -870,7 +870,7 @@ static NTSTATUS ntlmssp_server_postauth(struct gensec_security *gensec_security,
 		talloc_steal(ntlmssp_state, session_key.data);
 	}
 
-	if (ntlmssp_state->new_spnego) {
+	if (!ntlmssp_state->force_old_spnego) {
 		HMACMD5Context ctx;
 		uint8_t mic_buffer[NTLMSSP_MIC_SIZE] = { 0, };
 		int cmp;