diff --git a/src/views/apps.html b/src/views/apps.html
index 97c1952cc..2b2e97827 100644
--- a/src/views/apps.html
+++ b/src/views/apps.html
@@ -9,8 +9,8 @@
             <div class="modal-body" style="padding: 0 15px">
                 <fieldset>
                     <form role="form" name="appConfigureForm" ng-submit="appConfigure.submit()" autocomplete="off">
-                        <uib-tabset>
-                            <uib-tab index="0" heading="General">
+                        <uib-tabset active="appConfigure.action">
+                            <uib-tab index="'general'" heading="General">
                                 <br/>
                                 <div class="has-error text-center" ng-show="appConfigure.error.other">{{ appConfigure.error.other }}</div>
                                 <div class="form-group" ng-class="{ 'has-error': (appConfigureForm.location.$dirty && appConfigureForm.location.$invalid) || (!appConfigureForm.location.$dirty && appConfigure.error.location)  }">
@@ -101,7 +101,7 @@
 
                             </uib-tab>
 
-                            <uib-tab index="1" heading="Advanced">
+                            <uib-tab index="'advanced'" heading="Advanced">
                                 <br/>
                                 <div class="form-group">
                                     <label class="control-label" for="memoryLimit">Memory Limit <sup><a ng-href="{{ config.webServerOrigin }}/documentation/apps/#increasing-the-memory-limit-of-an-app" class="help" target="_blank"><i class="fa fa-question-circle"></i></a></sup> : <b>{{ appConfigure.memoryLimit ? appConfigure.memoryLimit / 1024 / 1024 + 'MB' : 'Default (256 MB)' }}</b></label>
diff --git a/src/views/apps.js b/src/views/apps.js
index 3786ecddc..b86a4c15d 100644
--- a/src/views/apps.js
+++ b/src/views/apps.js
@@ -43,6 +43,8 @@ angular.module('Application').controller('AppsController', ['$scope', '$location
         alternateDomain: null,
         ssoAuth: false,
 
+        action: 'general',
+
         isAccessRestrictionValid: function () {
             var tmp = $scope.appConfigure.accessRestriction;
             return !!(tmp.users.length || tmp.groups.length);
@@ -170,16 +172,20 @@ angular.module('Application').controller('AppsController', ['$scope', '$location
             }
 
             Client.configureApp($scope.appConfigure.app.id, data, function (error) {
+                let tab = 'advanced'; // the tab to switch to
+
                 if (error) {
-                    if (error.statusCode === 409 && (error.message.indexOf('is reserved') !== -1 || error.message.indexOf('is already in use') !== -1)) {
+                    if (error.statusCode === 409 && (error.message.indexOf('Port') !== -1)) {
                         $scope.appConfigure.error.port = error.message;
+                        tab = 'general';
                     } else if (error.statusCode === 400 && error.message.indexOf('mailbox') !== -1 ) {
                         $scope.appConfigure.error.mailboxName = error.message;
                         $scope.appConfigureForm.mailboxName.$setPristine();
                         $('#appConfigureMailboxNameInput').focus();
-                    } else if (error.statusCode === 409) {
+                    } else if (error.statusCode === 409 && error.message.indexOf('subdomain') !== -1) {
                         $scope.appConfigure.error.location = error.message;
                         $scope.appConfigureForm.location.$setPristine();
+                        tab = 'general';
                         $('#appConfigureLocationInput').focus();
                     } else if (error.statusCode === 400 && error.message.indexOf('cert') !== -1 ) {
                         $scope.appConfigure.error.cert = error.message;
@@ -195,14 +201,16 @@ angular.module('Application').controller('AppsController', ['$scope', '$location
                         $scope.appConfigure.error.alternateDomains = error.message;
                         $scope.appConfigureForm.alternateDomains.$setPristine();
                         $('#appConfigureAlternateSubdomainInput').focus();
-                    } else if (error.statusCode === 400 && error.message.indexOf('dataDir') !== -1 ) {
+                    } else if (error.message.indexOf('dataDir') !== -1 ) { // can be 400 or 409
                         $scope.appConfigure.error.dataDir = error.message;
                         $scope.appConfigureForm.dataDir.$setPristine();
                         $('#appConfigureDataDirInput').focus();
                     } else {
                         $scope.appConfigure.error.other = error.message;
+                        tab = 'general';
                     }
 
+                    $scope.appConfigure.action = tab;
                     $scope.appConfigure.busy = false;
                     return;
                 }
diff --git a/src/views/appstore.js b/src/views/appstore.js
index 7f820fe84..1522ff358 100644
--- a/src/views/appstore.js
+++ b/src/views/appstore.js
@@ -177,10 +177,10 @@ angular.module('Application').controller('AppStoreController', ['$scope', '$loca
                         $('#collapseResourceConstraint').collapse('hide');
                         $('#collapseInstallForm').collapse('hide');
                         $('#collapseAppLimitReached').collapse('show');
-                    } else if (error.statusCode === 409 && (error.message.indexOf('is reserved') !== -1 || error.message.indexOf('is already in use') !== -1)) {
+                    } else if (error.statusCode === 409 && (error.message.indexOf('Port') !== -1)) {
                         $scope.appInstall.error.port = error.message;
-                    } else if (error.statusCode === 409) {
-                        $scope.appInstall.error.location = 'This name is already taken.';
+                    } else if (error.statusCode === 409 && error.message.indexOf('subdomain') !== -1) {
+                        $scope.appInstall.error.location = error.message;
                         $scope.appInstallForm.location.$setPristine();
                         $('#appInstallLocationInput').focus();
                     } else if (error.statusCode === 400 && error.message.indexOf('cert') !== -1 ) {