diff --git a/docs/management/advanced-options.asciidoc b/docs/management/advanced-options.asciidoc
index 3d15b0504e85cf..0aad6c2f6c3851 100644
--- a/docs/management/advanced-options.asciidoc
+++ b/docs/management/advanced-options.asciidoc
@@ -103,7 +103,8 @@ Example: `{ "display": "15 seconds", "pause": true, "value": 15000 }`.
 `timepicker:timeDefaults`:: The default selection in the time filter.
 `truncate:maxHeight`:: The maximum height that a cell occupies in a table. Set to 0 to disable
 truncation.
-`xPack:defaultAdminEmail`:: Email address for X-Pack admin operations, such as
+`xPack:defaultAdminEmail`:: **Deprecated. Use <<cluster-alert-email-notifications,Email Notifications>> instead.**
+Email address for X-Pack admin operations, such as
 cluster alert notifications from Monitoring.
 
 
diff --git a/src/core/public/doc_links/doc_links_service.ts b/src/core/public/doc_links/doc_links_service.ts
index 9b672d40961d8e..41d934895ef412 100644
--- a/src/core/public/doc_links/doc_links_service.ts
+++ b/src/core/public/doc_links/doc_links_service.ts
@@ -119,6 +119,7 @@ export class DocLinksService {
           dateMath: `${ELASTICSEARCH_DOCS}common-options.html#date-math`,
         },
         management: {
+          kibanaGeneralSettings: `${ELASTIC_WEBSITE_URL}guide/en/kibana/${DOC_LINK_VERSION}/advanced-options.html#kibana-general-settings`,
           kibanaSearchSettings: `${ELASTIC_WEBSITE_URL}guide/en/kibana/${DOC_LINK_VERSION}/advanced-options.html#kibana-search-settings`,
           dashboardSettings: `${ELASTIC_WEBSITE_URL}guide/en/kibana/${DOC_LINK_VERSION}/advanced-options.html#kibana-dashboard-settings`,
         },
diff --git a/x-pack/legacy/plugins/xpack_main/index.js b/x-pack/legacy/plugins/xpack_main/index.js
index aeabbb12928754..d4df995492db01 100644
--- a/x-pack/legacy/plugins/xpack_main/index.js
+++ b/x-pack/legacy/plugins/xpack_main/index.js
@@ -52,6 +52,13 @@ export const xpackMain = (kibana) => {
             defaultMessage:
               'Recipient email address for X-Pack admin operations, such as Cluster Alert email notifications from Monitoring.',
           }),
+          deprecation: {
+            message: i18n.translate('xpack.main.uiSettings.adminEmailDeprecation', {
+              defaultMessage:
+                'This setting is deprecated and will not be supported in Kibana 8.0. Please configure `monitoring.cluster_alerts.email_notifications.email_address` in your kibana.yml settings.',
+            }),
+            docLinksKey: 'kibanaGeneralSettings',
+          },
           type: 'string', // TODO: Any way of ensuring this is a valid email address?
           value: null,
         },
diff --git a/x-pack/plugins/monitoring/common/constants.ts b/x-pack/plugins/monitoring/common/constants.ts
index eeed7b4d5acf61..b781740bed7ad9 100644
--- a/x-pack/plugins/monitoring/common/constants.ts
+++ b/x-pack/plugins/monitoring/common/constants.ts
@@ -258,5 +258,6 @@ export const NUMBER_OF_MIGRATED_ALERTS = 2;
  * The advanced settings config name for the email address
  */
 export const MONITORING_CONFIG_ALERTING_EMAIL_ADDRESS = 'monitoring:alertingEmailAddress';
+export const XPACK_DEFAULT_ADMIN_EMAIL_UI_SETTING = 'xPack:defaultAdminEmail';
 
 export const ALERT_EMAIL_SERVICES = ['gmail', 'hotmail', 'icloud', 'outlook365', 'ses', 'yahoo'];
diff --git a/x-pack/plugins/monitoring/server/core_services.ts b/x-pack/plugins/monitoring/server/core_services.ts
new file mode 100644
index 00000000000000..54fbbf310b188f
--- /dev/null
+++ b/x-pack/plugins/monitoring/server/core_services.ts
@@ -0,0 +1,48 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { CoreStart, CoreSetup } from 'kibana/server';
+
+import { SavedObjectsClient } from '../../../../src/core/server';
+
+export class CoreServices {
+  private static _coreSetup: CoreSetup;
+  private static _coreStart: CoreStart;
+
+  public static init(core: CoreSetup) {
+    this._coreSetup = core;
+  }
+
+  public static get coreSetup(): CoreSetup {
+    this.checkError();
+    return this._coreSetup;
+  }
+
+  public static async getCoreStart(): Promise<CoreStart> {
+    if (this._coreStart) {
+      return this._coreStart;
+    }
+    const [coreStart] = await this.coreSetup.getStartServices();
+    this._coreStart = coreStart;
+    return coreStart;
+  }
+
+  public static async getUISetting(key: string) {
+    const coreStart = await this.getCoreStart();
+    const { savedObjects, uiSettings } = coreStart;
+    const savedObjectsClient = new SavedObjectsClient(savedObjects.createInternalRepository());
+    const theSettings = uiSettings.asScopedToClient(savedObjectsClient);
+    return await theSettings.get(key);
+  }
+
+  private static checkError() {
+    if (!this._coreSetup) {
+      throw new Error(
+        'CoreServices has not been initialized. Please run CoreServices.init(...) before use'
+      );
+    }
+  }
+}
diff --git a/x-pack/plugins/monitoring/server/deprecations.ts b/x-pack/plugins/monitoring/server/deprecations.ts
index d40837885e1983..71b54313f31938 100644
--- a/x-pack/plugins/monitoring/server/deprecations.ts
+++ b/x-pack/plugins/monitoring/server/deprecations.ts
@@ -44,12 +44,15 @@ export const deprecations = ({
     ),
     renameFromRoot('xpack.monitoring', 'monitoring'),
     (config, fromPath, logger) => {
-      const clusterAlertsEnabled = get(config, 'cluster_alerts.enabled');
+      const clusterAlertsEnabled = get(config, 'monitoring.cluster_alerts.enabled', true);
       const emailNotificationsEnabled =
-        clusterAlertsEnabled && get(config, 'cluster_alerts.email_notifications.enabled');
-      if (emailNotificationsEnabled && !get(config, CLUSTER_ALERTS_ADDRESS_CONFIG_KEY)) {
+        clusterAlertsEnabled &&
+        get(config, 'monitoring.cluster_alerts.email_notifications.enabled', true);
+      const updatedKey = get(config, `monitoring.${CLUSTER_ALERTS_ADDRESS_CONFIG_KEY}`);
+      const legacyKey = get(config, `xpack.monitoring.${CLUSTER_ALERTS_ADDRESS_CONFIG_KEY}`);
+      if (emailNotificationsEnabled && !updatedKey && !legacyKey) {
         logger(
-          `Config key [${fromPath}.${CLUSTER_ALERTS_ADDRESS_CONFIG_KEY}] will be required for email notifications to work in 7.0."`
+          `Config key [${fromPath}.${CLUSTER_ALERTS_ADDRESS_CONFIG_KEY}] will be required for email notifications to work in 8.0."`
         );
       }
       return config;
diff --git a/x-pack/plugins/monitoring/server/kibana_monitoring/collectors/get_settings_collector.ts b/x-pack/plugins/monitoring/server/kibana_monitoring/collectors/get_settings_collector.ts
index 1b7c127f64286b..7e04d4b34f63cc 100644
--- a/x-pack/plugins/monitoring/server/kibana_monitoring/collectors/get_settings_collector.ts
+++ b/x-pack/plugins/monitoring/server/kibana_monitoring/collectors/get_settings_collector.ts
@@ -4,15 +4,41 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-import { KIBANA_SETTINGS_TYPE } from '../../../common/constants';
+import {
+  KIBANA_SETTINGS_TYPE,
+  XPACK_DEFAULT_ADMIN_EMAIL_UI_SETTING,
+  CLUSTER_ALERTS_ADDRESS_CONFIG_KEY,
+} from '../../../common/constants';
 import { MonitoringConfig } from '../../config';
+import { CoreServices } from '../../core_services';
+import { Logger } from '../../../../../../src/core/server';
 
+let loggedDeprecationWarning = false;
 /*
  * Check if Cluster Alert email notifications is enabled in config
  * If so, use uiSettings API to fetch the X-Pack default admin email
  */
-export async function getDefaultAdminEmail(config: MonitoringConfig) {
-  return config.cluster_alerts.email_notifications.email_address || null;
+export async function getDefaultAdminEmail(config: MonitoringConfig, log?: Logger) {
+  const {
+    email_notifications: { enabled, email_address: emailAddress },
+  } = config.cluster_alerts;
+
+  if (enabled && emailAddress?.length) {
+    return emailAddress;
+  }
+
+  const defaultAdminEmail = await CoreServices.getUISetting(XPACK_DEFAULT_ADMIN_EMAIL_UI_SETTING);
+
+  if (defaultAdminEmail && !loggedDeprecationWarning && log) {
+    const emailAddressConfigKey = `monitoring.${CLUSTER_ALERTS_ADDRESS_CONFIG_KEY}`;
+    loggedDeprecationWarning = true;
+    const message =
+      `Monitoring is using "${XPACK_DEFAULT_ADMIN_EMAIL_UI_SETTING}" for cluster alert notifications, ` +
+      `which will not be supported in Kibana 8.0. Please configure ${emailAddressConfigKey} in your kibana.yml settings`;
+    log.warn(message);
+  }
+
+  return defaultAdminEmail;
 }
 
 // we use shouldUseNull to determine if we need to send nulls; we only send nulls if the last email wasn't null
@@ -21,9 +47,10 @@ let shouldUseNull = true;
 export async function checkForEmailValue(
   config: MonitoringConfig,
   _shouldUseNull = shouldUseNull,
-  _getDefaultAdminEmail = getDefaultAdminEmail
+  _getDefaultAdminEmail = getDefaultAdminEmail,
+  log?: Logger
 ) {
-  const defaultAdminEmail = await _getDefaultAdminEmail(config);
+  const defaultAdminEmail = await _getDefaultAdminEmail(config, log);
 
   // Allow null so clearing the advanced setting will be reflected in the data
   const isAcceptableNull = defaultAdminEmail === null && _shouldUseNull;
diff --git a/x-pack/plugins/monitoring/server/plugin.ts b/x-pack/plugins/monitoring/server/plugin.ts
index 9b0cd3e43daeac..e19dbb2fe1e6ba 100644
--- a/x-pack/plugins/monitoring/server/plugin.ts
+++ b/x-pack/plugins/monitoring/server/plugin.ts
@@ -52,6 +52,7 @@ import {
 import { getLicenseExpiration } from './alerts/license_expiration';
 import { getClusterState } from './alerts/cluster_state';
 import { InfraPluginSetup } from '../../infra/server';
+import { CoreServices } from './core_services';
 
 export interface LegacyAPI {
   getServerStatus: () => string;
@@ -131,6 +132,8 @@ export class Plugin {
       .pipe(first())
       .toPromise();
 
+    CoreServices.init(core);
+
     this.legacyShimDependencies = {
       router: core.http.createRouter(),
       instanceUuid: core.uuid.getInstanceUuid(),