GUACAMOLE-249: Do not include "extended mode" NLA in security negotiation as negotiation fails (see FreeRDP defaults).
diff --git a/src/protocols/rdp/settings.c b/src/protocols/rdp/settings.c
index 97e9daf..224a281 100644
--- a/src/protocols/rdp/settings.c
+++ b/src/protocols/rdp/settings.c
@@ -1256,7 +1256,7 @@
             rdp_settings->RdpSecurity = TRUE;
             rdp_settings->TlsSecurity = TRUE;
             rdp_settings->NlaSecurity = TRUE;
-            rdp_settings->ExtSecurity = TRUE;
+            rdp_settings->ExtSecurity = FALSE;
             break;
 
     }