diff --git a/apps/dav/lib/CalDAV/BirthdayCalendar/EnablePlugin.php b/apps/dav/lib/CalDAV/BirthdayCalendar/EnablePlugin.php
index 9f9b24e205..497d7112b3 100644
--- a/apps/dav/lib/CalDAV/BirthdayCalendar/EnablePlugin.php
+++ b/apps/dav/lib/CalDAV/BirthdayCalendar/EnablePlugin.php
@@ -23,6 +23,7 @@
 
 namespace OCA\DAV\CalDAV\BirthdayCalendar;
 
+use OCA\DAV\CalDAV\BirthdayService;
 use OCA\DAV\CalDAV\CalendarHome;
 use Sabre\DAV\Server;
 use Sabre\DAV\ServerPlugin;
@@ -44,6 +45,11 @@ class EnablePlugin extends ServerPlugin {
 	 */
 	protected $config;
 
+	/**
+	 * @var BirthdayService
+	 */
+	protected $birthdayService;
+
 	/**
 	 * @var Server
 	 */
@@ -53,9 +59,11 @@ class EnablePlugin extends ServerPlugin {
 	 * PublishPlugin constructor.
 	 *
 	 * @param IConfig $config
+	 * @param BirthdayService $birthdayService
 	 */
-	public function __construct(IConfig $config) {
+	public function __construct(IConfig $config, BirthdayService $birthdayService) {
 		$this->config = $config;
+		$this->birthdayService = $birthdayService;
 	}
 
 	/**
@@ -122,6 +130,7 @@ class EnablePlugin extends ServerPlugin {
 		$userId = substr($principalUri, 17);
 
 		$this->config->setUserValue($userId, 'dav', 'generateBirthdayCalendar', 'yes');
+		$this->birthdayService->syncUser($userId);
 
 		$this->server->httpResponse->setStatus(204);
 
diff --git a/apps/dav/lib/Server.php b/apps/dav/lib/Server.php
index ab20d14cab..afa52530b0 100644
--- a/apps/dav/lib/Server.php
+++ b/apps/dav/lib/Server.php
@@ -33,6 +33,7 @@
 namespace OCA\DAV;
 
 use OC\AppFramework\Utility\TimeFactory;
+use OCA\DAV\CalDAV\BirthdayService;
 use OCA\DAV\CalDAV\Schedule\IMipPlugin;
 use OCA\DAV\CardDAV\ImageExportPlugin;
 use OCA\DAV\CardDAV\PhotoCache;
@@ -260,7 +261,8 @@ class Server {
 					)));
 				}
 				$this->server->addPlugin(new \OCA\DAV\CalDAV\BirthdayCalendar\EnablePlugin(
-					\OC::$server->getConfig()
+					\OC::$server->getConfig(),
+					\OC::$server->query(BirthdayService::class)
 				));
 			}
 
diff --git a/apps/dav/tests/unit/CalDAV/BirthdayCalendar/EnablePluginTest.php b/apps/dav/tests/unit/CalDAV/BirthdayCalendar/EnablePluginTest.php
index 6e7965ea61..44bf9237b2 100644
--- a/apps/dav/tests/unit/CalDAV/BirthdayCalendar/EnablePluginTest.php
+++ b/apps/dav/tests/unit/CalDAV/BirthdayCalendar/EnablePluginTest.php
@@ -22,6 +22,7 @@
 namespace OCA\DAV\Tests\unit\CalDAV\BirthdayCalendar;
 
 use OCA\DAV\CalDAV\BirthdayCalendar\EnablePlugin;
+use OCA\DAV\CalDAV\BirthdayService;
 use OCA\DAV\CalDAV\Calendar;
 use OCA\DAV\CalDAV\CalendarHome;
 use OCP\IConfig;
@@ -35,6 +36,9 @@ class EnablePluginTest extends TestCase {
 	/** @var \OCP\IConfig|\PHPUnit_Framework_MockObject_MockObject */
 	protected $config;
 
+	/** @var BirthdayService |\PHPUnit_Framework_MockObject_MockObject */
+	protected $birthdayService;
+
 	/** @var \OCA\DAV\CalDAV\BirthdayCalendar\EnablePlugin $plugin */
 	protected $plugin;
 
@@ -51,8 +55,9 @@ class EnablePluginTest extends TestCase {
 		$this->server->xml = $this->createMock(\Sabre\DAV\Xml\Service::class);
 
 		$this->config = $this->createMock(IConfig::class);
+		$this->birthdayService = $this->createMock(BirthdayService::class);
 
-		$this->plugin = new EnablePlugin($this->config);
+		$this->plugin = new EnablePlugin($this->config, $this->birthdayService);
 		$this->plugin->initialize($this->server);
 
 		$this->request = $this->createMock(\Sabre\HTTP\RequestInterface::class);
@@ -70,7 +75,7 @@ class EnablePluginTest extends TestCase {
 	public function testInitialize() {
 		$server = $this->createMock(\Sabre\DAV\Server::class);
 
-		$plugin = new EnablePlugin($this->config);
+		$plugin = new EnablePlugin($this->config, $this->birthdayService);
 
 		$server->expects($this->at(0))
 			->method('on')
@@ -93,6 +98,9 @@ class EnablePluginTest extends TestCase {
 		$this->config->expects($this->never())
 			->method('setUserValue');
 
+		$this->birthdayService->expects($this->never())
+			->method('syncUser');
+
 		$this->plugin->httpPost($this->request, $this->response);
 	}
 
@@ -124,6 +132,9 @@ class EnablePluginTest extends TestCase {
 		$this->config->expects($this->never())
 			->method('setUserValue');
 
+		$this->birthdayService->expects($this->never())
+			->method('syncUser');
+
 		$this->plugin->httpPost($this->request, $this->response);
 	}
 
@@ -160,6 +171,10 @@ class EnablePluginTest extends TestCase {
 			->method('setUserValue')
 			->with('BlaBlub', 'dav', 'generateBirthdayCalendar', 'yes');
 
+		$this->birthdayService->expects($this->once())
+			->method('syncUser')
+			->with('BlaBlub');
+
 		$this->server->httpResponse->expects($this->once())
 			->method('setStatus')
 			->with(204);