diff --git a/client/lib/open/screens/add_instance/screens/add_instance_form.dart b/client/lib/open/screens/add_instance/screens/add_instance_form.dart
index bdbf2620..b4e63c7e 100644
--- a/client/lib/open/screens/add_instance/screens/add_instance_form.dart
+++ b/client/lib/open/screens/add_instance/screens/add_instance_form.dart
@@ -187,7 +187,10 @@ Future<void> _handleSubmit(
   final uri = Uri.parse(url);
   final enrolmentResponse = await proxyApi.startEnrollment(uri, requestData);
   if (!enrolmentResponse.user.enrolled) {
-    toaster.showError(message: "Only enrolled users can add devices.");
+    toaster.showError(
+      message:
+          "Enrol via the Defguard Desktop App first to add mobile devices.",
+    );
     return;
   }
   final instanceId = enrolmentResponse.instance.id;
diff --git a/client/lib/open/screens/add_instance/screens/add_instance_qr_screen.dart b/client/lib/open/screens/add_instance/screens/add_instance_qr_screen.dart
index 3634a88d..59dff05a 100644
--- a/client/lib/open/screens/add_instance/screens/add_instance_qr_screen.dart
+++ b/client/lib/open/screens/add_instance/screens/add_instance_qr_screen.dart
@@ -43,7 +43,8 @@ class AddInstanceQrScreen extends HookConsumerWidget {
             );
             if (!registrationResponse.user.enrolled) {
               toaster.showError(
-                message: "Only enrolled users can add devices.",
+                message:
+                    "Enrol via the Defguard Desktop App first to add mobile devices.",
               );
               isLoading.value = false;
               await controller.resume();