diff --git a/checker/rule.go b/checker/rule.go
index 3a83adb..b329901 100644
--- a/checker/rule.go
+++ b/checker/rule.go
@@ -401,8 +401,8 @@ func (r *autodiscoverRule) Evaluate(ctx context.Context, obs sdk.ObservationGett
 		})
 	}
 	return single(sdk.CheckState{
-		Status:  sdk.StatusInfo,
-		Message: "No Microsoft Autodiscover endpoint found (not required for Thunderbird-style clients).",
+		Status:  sdk.StatusWarn,
+		Message: "No Microsoft Autodiscover endpoint found; Outlook and other Autodiscover-based clients cannot bootstrap automatically.",
 		Code:    "autoconfig_autodiscover_missing",
 	})
 }