ammendment to properly fix #17489 (#17499)

for #17489, found an edge case during extra testing.

server/service/osquery_utils/queries.go

@@ -1565,7 +1565,11 @@ func deduceMDMNameWindows(data map[string]string) string {
 }
 
 func directIngestMDMWindows(ctx context.Context, logger log.Logger, host *fleet.Host, ds fleet.Datastore, rows []map[string]string) error {
-	if len(rows) != 1 {
+	if len(rows) == 0 {
+		// no mdm information in the registry
+		return ds.SetOrUpdateMDMData(ctx, host.ID, false, false, "", false, "", "")
+	}
+	if len(rows) > 1 {
 		logger.Log("component", "service", "method", "directIngestMDMWindows", "warn",
 			fmt.Sprintf("mdm expected single result got %d", len(rows)))
 		// assume the extension is not there

server/service/osquery_utils/queries_test.go

@@ -715,6 +715,14 @@ func TestDirectIngestMDMWindows(t *testing.T) {
 			wantIsServer:         false,
 			wantServerURL:        "",
 		},
+		{
+			name:                 "off no rows",
+			data:                 []map[string]string{},
+			wantEnrolled:         false,
+			wantInstalledFromDep: false,
+			wantIsServer:         false,
+			wantServerURL:        "",
+		},
 		{
 			name: "on automatic",
 			data: []map[string]string{