@@ -, +, @@ 
    Patch for authz_dbd
--- a/modules/aaa/mod_authz_dbd.c	
+++ a/modules/aaa/mod_authz_dbd.c	
@@ -311,6 +311,11 @@ static authz_status dbdgroup_check_authorization(request_rec *r,
             return AUTHZ_GRANTED;
         }
     }
+    
+    ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO()
+                  "authz_dbd authorize: Authorization of user %s to access %s failed, reason: "
+                  "user is not part of the 'require'ed dbd-group(s).",
+                  r->user, r->uri);
 
     return AUTHZ_DENIED;
 }