diff --git a/apigee_edge.install b/apigee_edge.install
index e0837b597..941bb79c0 100644
--- a/apigee_edge.install
+++ b/apigee_edge.install
@@ -28,6 +28,7 @@ use Drupal\Core\Field\BaseFieldDefinition;
 use Drupal\Core\Installer\InstallerKernel;
 use Drupal\Core\Url;
 use Drupal\user\RoleInterface;
+use Drupal\Core\Config\FileStorage;
 
 /**
  * Implements hook_requirements().
@@ -373,3 +374,18 @@ function apigee_edge_update_9001() {
 
   $definition_update_manager->updateFieldableEntityType($entity_type, $field_storage_definitions);
 }
+
+/**
+ * Install Configs for Core Entity View Display for Default Team App
+ */
+function apigee_edge_update_9002() {
+  // Update existing config.
+  /** @var \Drupal\Core\Config\StorageInterface $config_storage */
+  $config_storage = \Drupal::service('config.storage');
+  $module_path = \Drupal::service('extension.list.module')->getPath('apigee_edge');
+  $source = new FileStorage("$module_path/config/install");
+  $new_edge_settings = $source->read('core.entity_view_display.developer_app.developer_app.default');
+  $edge_settings = $config_storage->read('core.entity_view_display.developer_app.developer_app.default');
+  $edge_settings['content']['callbackUrl'] = $new_edge_settings['content']['callbackUrl'];
+  $config_storage->write('core.entity_view_display.developer_app.developer_app.default', $edge_settings);
+}
diff --git a/apigee_edge.module b/apigee_edge.module
index 304f90211..ad7685dee 100644
--- a/apigee_edge.module
+++ b/apigee_edge.module
@@ -366,10 +366,7 @@ function apigee_edge_entity_extra_field_info() {
  * Implements hook_field_formatter_info_alter().
  */
 function apigee_edge_field_formatter_info_alter(array &$info) {
-  // Allows using the 'uri_link' formatter for the 'app_callback_url'
-  // field type, which uses it as default formatter.
-  // @see \Drupal\apigee_edge\Plugin\Field\FieldType\AppCallbackUrlItem
-  $info['uri_link']['field_types'][] = 'app_callback_url';
+  $info['basic_string']['field_types'][] = 'app_callback_url';
 }
 
 /**
diff --git a/config/install/core.entity_view_display.developer_app.developer_app.default.yml b/config/install/core.entity_view_display.developer_app.developer_app.default.yml
index 1fcbb3618..27b9925ef 100644
--- a/config/install/core.entity_view_display.developer_app.developer_app.default.yml
+++ b/config/install/core.entity_view_display.developer_app.developer_app.default.yml
@@ -14,7 +14,7 @@ content:
     region: content
     settings: {  }
     third_party_settings: {  }
-    type: uri_link
+    type: basic_string
   createdAt:
     type: timestamp_ago
     label: inline
diff --git a/modules/apigee_edge_teams/apigee_edge_teams.install b/modules/apigee_edge_teams/apigee_edge_teams.install
index bd629d1f6..a3191e3bb 100644
--- a/modules/apigee_edge_teams/apigee_edge_teams.install
+++ b/modules/apigee_edge_teams/apigee_edge_teams.install
@@ -200,3 +200,18 @@ function apigee_edge_teams_update_9001() {
 
   $definition_update_manager->updateFieldableEntityType($entity_type, $field_storage_definitions);
 }
+
+/**
+ * Install Configs for Core Entity View Display for Default Team App
+ */
+function apigee_edge_teams_update_9002() {
+  // Update existing config.
+  /** @var \Drupal\Core\Config\StorageInterface $config_storage */
+  $config_storage = \Drupal::service('config.storage');
+  $module_path = \Drupal::service('extension.list.module')->getPath('apigee_edge_teams');
+  $source = new FileStorage("$module_path/config/install");
+  $new_team_settings = $source->read('core.entity_view_display.team_app.team_app.default');
+  $team_settings = $config_storage->read('core.entity_view_display.team_app.team_app.default');
+  $team_settings['content']['callbackUrl'] = $new_team_settings['content']['callbackUrl'];
+  $config_storage->write('core.entity_view_display.team_app.team_app.default', $team_settings);
+}
diff --git a/modules/apigee_edge_teams/config/install/core.entity_view_display.team_app.team_app.default.yml b/modules/apigee_edge_teams/config/install/core.entity_view_display.team_app.team_app.default.yml
index adb6861fe..428925767 100644
--- a/modules/apigee_edge_teams/config/install/core.entity_view_display.team_app.team_app.default.yml
+++ b/modules/apigee_edge_teams/config/install/core.entity_view_display.team_app.team_app.default.yml
@@ -15,7 +15,7 @@ content:
     region: content
     settings: {  }
     third_party_settings: {  }
-    type: uri_link
+    type: basic_string
   createdAt:
     type: timestamp_ago
     label: inline
diff --git a/src/Entity/App.php b/src/Entity/App.php
index c11eb578b..f274ae9e6 100644
--- a/src/Entity/App.php
+++ b/src/Entity/App.php
@@ -388,54 +388,6 @@ protected static function propertyToBaseFieldBlackList(): array {
     ]);
   }
 
-  /**
-   * {@inheritdoc}
-   */
-  public function get($field_name) {
-    $value = parent::get($field_name);
-
-    // Make sure that returned callback url field values are actually valid
-    // URLs. Apigee Edge allows to set anything as callbackUrl value but
-    // Drupal can only accept valid URIs.
-    if ($field_name === 'callbackUrl') {
-      if (!$value->isEmpty()) {
-        foreach ($value->getValue() as $id => $item) {
-          try {
-            Url::fromUri($item['value']);
-          }
-          catch (\Exception $exception) {
-            $value->removeItem($id);
-          }
-        }
-      }
-    }
-
-    return $value;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function set($field_name, $value, $notify = TRUE) {
-    // If the callback URL value is not a valid URL then save an empty string
-    // as the field value and set the callbackUrl property to the original
-    // value. (So we can display the original (invalid URL) on the edit form.)
-    // This trick is not necessary if the value's type is array because in this
-    // case the field value is set on the developer app edit form.
-    if ($field_name === 'callbackUrl' && !is_array($value)) {
-      try {
-        Url::fromUri($value);
-      }
-      catch (\Exception $exception) {
-        /** @var \Drupal\apigee_edge\Entity\App $app */
-        $app = parent::set($field_name, '', $notify);
-        $app->setCallbackUrl($value);
-        return $app;
-      }
-    }
-    return parent::set($field_name, $value, $notify);
-  }
-
   /**
    * {@inheritdoc}
    */
diff --git a/src/Entity/AppViewBuilder.php b/src/Entity/AppViewBuilder.php
index 3436d1961..c31ddb917 100644
--- a/src/Entity/AppViewBuilder.php
+++ b/src/Entity/AppViewBuilder.php
@@ -28,37 +28,4 @@
  */
 class AppViewBuilder extends EdgeEntityViewBuilder {
 
-  /**
-   * {@inheritdoc}
-   */
-  public function buildMultiple(array $build_list) {
-    $results = parent::buildMultiple($build_list);
-    foreach (Element::children($results) as $key) {
-      /** @var \Drupal\apigee_edge\Entity\AppInterface $app */
-      $app = $results[$key]["#{$this->entityTypeId}"];
-      // If the callback field is visible, display an error message if the
-      // callback url field value does not contain a valid URI.
-      if (array_key_exists('callbackUrl', $results[$key]) && !empty($app->getCallbackUrl()) && $app->getCallbackUrl() !== $app->get('callbackUrl')->value) {
-        try {
-          Url::fromUri($app->getCallbackUrl());
-        }
-        catch (\Exception $exception) {
-          $results[$key]['callback_url_error'] = [
-            '#theme' => 'status_messages',
-            '#message_list' => [
-              'warning' => [$this->t('The @field value should be fixed. @message', [
-                '@field' => $app->getFieldDefinition('callbackUrl')->getLabel(),
-                '@message' => $exception->getMessage(),
-              ]),
-              ],
-            ],
-              // Display it on the top of the view.
-            '#weight' => -100,
-          ];
-        }
-      }
-    }
-    return $results;
-  }
-
 }
diff --git a/src/Form/AppCallbackUrlSettingsForm.php b/src/Form/AppCallbackUrlSettingsForm.php
index b532cfd84..b6326550f 100644
--- a/src/Form/AppCallbackUrlSettingsForm.php
+++ b/src/Form/AppCallbackUrlSettingsForm.php
@@ -93,8 +93,18 @@ public function buildForm(array $form, FormStateInterface $form_state) {
   public function validateForm(array &$form, FormStateInterface $form_state) {
     parent::validateForm($form, $form_state);
 
-    if (mb_strpos($form_state->getValue(['callback_url', 'pattern'], ''), '^http') === FALSE) {
-      $form_state->setError($form['callback_url']['pattern'], $this->t('The pattern should start with <em>^http</em> to limit the acceptable protocols.'));
+    $isRegExValid = FALSE;
+    try {
+      if (@preg_match('/' . $form_state->getValue(['callback_url', 'pattern']) . '/', '') !== FALSE) {
+        $isRegExValid = TRUE;
+      }
+    }
+    catch (Exception $e) {
+      $isRegExValid = FALSE;
+    }
+
+    if (!$isRegExValid) {
+      $form_state->setError($form['callback_url']['pattern'], $this->t('The pattern should be a valid regular expression.'));
     }
   }
 
diff --git a/src/Plugin/Field/FieldType/AppCallbackUrlItem.php b/src/Plugin/Field/FieldType/AppCallbackUrlItem.php
index a02930247..c8d742a52 100644
--- a/src/Plugin/Field/FieldType/AppCallbackUrlItem.php
+++ b/src/Plugin/Field/FieldType/AppCallbackUrlItem.php
@@ -20,7 +20,7 @@
 
 namespace Drupal\apigee_edge\Plugin\Field\FieldType;
 
-use Drupal\Core\Field\Plugin\Field\FieldType\UriItem;
+use Drupal\Core\Field\Plugin\Field\FieldType\StringItem;
 
 /**
  * App callback url specific plugin implementation of a URI item.
@@ -33,10 +33,10 @@
  *   label = @Translation("App Callback URL"),
  *   description = @Translation("An entity field containing a callback url for an app."),
  *   no_ui = TRUE,
- *   default_formatter = "uri_link",
+ *   default_formatter = "basic_string",
  *   default_widget = "app_callback_url",
  * )
  */
-class AppCallbackUrlItem extends UriItem {
+class AppCallbackUrlItem extends StringItem {
 
 }
diff --git a/src/Plugin/Field/FieldWidget/AppCallbackUrlWidget.php b/src/Plugin/Field/FieldWidget/AppCallbackUrlWidget.php
index b49fc0dfb..52d51a0e9 100644
--- a/src/Plugin/Field/FieldWidget/AppCallbackUrlWidget.php
+++ b/src/Plugin/Field/FieldWidget/AppCallbackUrlWidget.php
@@ -21,7 +21,7 @@
 namespace Drupal\apigee_edge\Plugin\Field\FieldWidget;
 
 use Drupal\Core\Field\FieldItemListInterface;
-use Drupal\Core\Field\Plugin\Field\FieldWidget\UriWidget;
+use Drupal\Core\Field\Plugin\Field\FieldWidget\StringTextfieldWidget;
 use Drupal\Core\Form\FormStateInterface;
 
 /**
@@ -43,7 +43,7 @@
  *   }
  * )
  */
-class AppCallbackUrlWidget extends UriWidget {
+class AppCallbackUrlWidget extends StringTextfieldWidget {
 
   /**
    * {@inheritdoc}
diff --git a/tests/src/Functional/DeveloperAppUITest.php b/tests/src/Functional/DeveloperAppUITest.php
index 0edab8e60..f637f987d 100644
--- a/tests/src/Functional/DeveloperAppUITest.php
+++ b/tests/src/Functional/DeveloperAppUITest.php
@@ -529,7 +529,7 @@ public function testCallbackUrlValidationServerSide() {
     // Override default configuration.
     $description = 'This is a Callback URL field.';
     $this->config('apigee_edge.common_app_settings')
-      ->set('callback_url_pattern', '^https:\/\/example.com')
+      ->set('callback_url_pattern', '^(https?|sap):\/\/example.com')
       ->set('callback_url_description', $description)
       ->save();
 
@@ -548,15 +548,27 @@ public function testCallbackUrlValidationServerSide() {
     $this->assertSession()->pageTextContains($description);
     $this->drupalGet($app_edit_url);
     $this->submitForm([], 'Save');
-    $this->assertSession()->pageTextContains("The URL {$callback_url} is not valid.");
+    $this->assertSession()->pageTextContains("Callback URL field is not in the right format.");
     $this->drupalGet($app_edit_url);
     $this->submitForm([
-      'callbackUrl[0][value]' => 'http://example.com'
+      'callbackUrl[0][value]' => 'map://example.com'
     ], 'Save');
     $this->assertSession()->pageTextContains("Callback URL field is not in the right format.");
     $this->drupalGet($app_edit_url);
     $this->submitForm([
-      'callbackUrl[0][value]' => 'https://example.com'
+      'callbackUrl[0][value]' => 'http://example.com'
+    ], 'Save');
+    $this->assertSession()->pageTextContains('App has been successfully updated.');
+    $this->assertSession()->pageTextContains('http://example.com');
+    $this->drupalGet($app_edit_url);
+    $this->submitForm([
+      'callbackUrl[0][value]' => 'sap://example.com'
+    ], 'Save');
+    $this->assertSession()->pageTextContains('App has been successfully updated.');
+    $this->assertSession()->pageTextContains('sap://example.com');
+    $this->drupalGet($app_edit_url);
+    $this->submitForm([
+      'callbackUrl[0][value]' => 'https://example.com',
     ], 'Save');
     $this->assertSession()->pageTextContains('App has been successfully updated.');
     $this->assertSession()->pageTextContains('https://example.com');
@@ -570,40 +582,36 @@ public function testInvalidEdgeSideCallbackUrl() {
     $this->products[] = $this->createProduct();
     $callback_url = $this->randomGenerator->word(8);
     $callback_url_warning_msg = "The Callback URL value should be fixed. The URI '{$callback_url}' is invalid. You must use a valid URI scheme.";
-    $app = $this->createDeveloperApp([
-      'name' => $this->randomMachineName(),
-      'displayName' => $this->randomString(),
-      'callbackUrl' => $callback_url,
-    ],
+    $app = $this->createDeveloperApp(
+      [
+        'name' => $this->randomMachineName(),
+        'displayName' => $this->randomString(),
+        'callbackUrl' => $callback_url,
+      ],
       $this->account,
       [
         $this->products[0]->id(),
-      ]);
-
+      ]
+    );
     $app_view_url = $app->toUrl('canonical');
     $app_view_by_developer_url = $app->toUrl('canonical-by-developer');
     $app_edit_form_url = $app->toUrl('edit-form');
     $app_edit_form_for_developer_url = $app->toUrl('edit-form-for-developer');
-
     $this->drupalGet($app_view_url);
-    $this->assertSession()->pageTextContains($callback_url_warning_msg);
     $this->assertSession()->pageTextNotContains('Callback URL:');
     $this->drupalGet($app_view_by_developer_url);
-    $this->assertSession()->pageTextContains($callback_url_warning_msg);
     $this->assertSession()->pageTextNotContains('Callback URL:');
-
     $this->drupalGet($app_edit_form_url);
     $this->assertSession()->fieldValueEquals('callbackUrl[0][value]', $callback_url);
     $this->drupalGet($app_edit_form_for_developer_url);
     $this->assertSession()->fieldValueEquals('callbackUrl[0][value]', $callback_url);
-
     $this->drupalGet(Url::fromRoute('entity.entity_view_display.developer_app.default'));
     $this->submitForm([
-      'fields[callbackUrl][region]' => 'hidden'
+      'fields[callbackUrl][region]' => 'hidden',
     ], 'Save');
     $this->drupalGet(Url::fromRoute('entity.entity_form_display.developer_app.default'));
     $this->submitForm([
-      'fields[callbackUrl][region]' => 'hidden'
+      'fields[callbackUrl][region]' => 'hidden',
     ], 'Save');
 
     $this->drupalGet($app_view_url);
diff --git a/tests/src/FunctionalJavascript/DeveloperAppUITest.php b/tests/src/FunctionalJavascript/DeveloperAppUITest.php
index 7000cd92b..b3b605a2a 100644
--- a/tests/src/FunctionalJavascript/DeveloperAppUITest.php
+++ b/tests/src/FunctionalJavascript/DeveloperAppUITest.php
@@ -82,7 +82,7 @@ public function testCallbackUrlValidationClientSide() {
     // Override default configuration.
     $pattern_error_message = 'It must be https://example.com';
     $this->config('apigee_edge.common_app_settings')
-      ->set('callback_url_pattern', '^https:\/\/example.com')
+      ->set('callback_url_pattern', '^(https?|sap):\/\/example.com')
       ->set('callback_url_pattern_error_message', $pattern_error_message)
       ->save();
 
@@ -98,16 +98,23 @@ public function testCallbackUrlValidationClientSide() {
     $this->submitForm([], 'Save');
     $this->createScreenshot('DeveloperAppUITest-' . __FUNCTION__);
     $this->assertFalse($isValidInput());
-    $checkValidationMessage('Please enter a URL.');
     $this->drupalGet($app_edit_url);
-    $this->submitForm(['callbackUrl[0][value]' => 'http://example.com'], 'Save');
+    $this->submitForm(['callbackUrl[0][value]' => 'map://example.com'], 'Save');
     $this->createScreenshot('DeveloperAppUITest-' . __FUNCTION__);
     $this->assertFalse($isValidInput());
-    // The format in Firefox is different, it is only one line:
-    // "Please match the requested format: {$pattern_description}.".
     $checkValidationMessage('Please match the requested format.');
     $this->assertEquals($pattern_error_message, $this->getSession()->evaluateScript('document.getElementById("edit-callbackurl-0-value").title'));
     $this->drupalGet($app_edit_url);
+    $this->submitForm(['callbackUrl[0][value]' => 'sap://example.com'], 'Save');
+    $this->createScreenshot('DeveloperAppUITest-' . __FUNCTION__);
+    $this->assertSession()->pageTextContains('App has been successfully updated.');
+    $this->assertSession()->pageTextContains('sap://example.com');
+    $this->drupalGet($app_edit_url);
+    $this->submitForm(['callbackUrl[0][value]' => 'http://example.com'], 'Save');
+    $this->createScreenshot('DeveloperAppUITest-' . __FUNCTION__);
+    $this->assertSession()->pageTextContains('App has been successfully updated.');
+    $this->assertSession()->pageTextContains('http://example.com');
+    $this->drupalGet($app_edit_url);
     $this->submitForm(['callbackUrl[0][value]' => 'https://example.com'], 'Save');
     $this->assertSession()->pageTextContains('App has been successfully updated.');
     $this->assertSession()->pageTextContains('https://example.com');