diff --git a/webadmin/src/js/setupdns.js b/webadmin/src/js/setupdns.js
index 624cfdb08..ebc48c9bd 100644
--- a/webadmin/src/js/setupdns.js
+++ b/webadmin/src/js/setupdns.js
@@ -21,6 +21,7 @@ app.controller('SetupDNSController', ['$scope', '$http', 'Client', function ($sc
     $scope.showDNSSetup = false;
     $scope.instanceId = '';
     $scope.explicitZone = search.zone || '';
+    $scope.isEnterprise = !!search.enterprise;
     $scope.isDomain = false;
     $scope.isSubdomain = false;
 
diff --git a/webadmin/src/setupdns.html b/webadmin/src/setupdns.html
index 0e9d66d89..6792e0db9 100644
--- a/webadmin/src/setupdns.html
+++ b/webadmin/src/setupdns.html
@@ -58,7 +58,7 @@
                                 <div class="form-group" style="margin-bottom: 0;" ng-class="{ 'has-error': dnsCredentialsForm.domain.$dirty && dnsCredentialsForm.domain.$invalid }">
                                     <input type="text" class="form-control" ng-model="dnsCredentials.domain" name="domain" placeholder="example.com" required autofocus ng-disabled="dnsCredentials.busy">
                                 </div>
-                                <p ng-show="isSubdomain" class="text-bold">Installing on a subdomain requires an enterprise subscription.</p>
+                                <p ng-show="isSubdomain" class="text-bold">Installing on a subdomain requires an enterprise subscription. <a href="mailto:support@cloudron.io">Contact us</a></p>
                             </div>
                         </div>
                         <div class="row">
@@ -137,7 +137,7 @@
                         </div>
                         <div class="row">
                             <div class="col-md-12 text-center">
-                                <button type="submit" class="btn btn-primary" ng-disabled="dnsCredentialsForm.$invalid"/><i class="fa fa-circle-o-notch fa-spin" ng-show="dnsCredentials.busy"></i> Next</button>
+                                <button type="submit" class="btn btn-primary" ng-disabled="dnsCredentialsForm.$invalid || (isSubdomain && !isEnterprise)"/><i class="fa fa-circle-o-notch fa-spin" ng-show="dnsCredentials.busy"></i> Next</button>
                             </div>
                         </div>
                     </form>