diff --git a/apps/dav/command/syncsystemaddressbook.php b/apps/dav/command/syncsystemaddressbook.php
index acf9e869d0..74d8295e77 100644
--- a/apps/dav/command/syncsystemaddressbook.php
+++ b/apps/dav/command/syncsystemaddressbook.php
@@ -49,6 +49,10 @@ class SyncSystemAddressBook extends Command {
 			->setDescription('Synchronizes users to the system addressbook');
 	}
 
+	/**
+	 * @param InputInterface $input
+	 * @param OutputInterface $output
+	 */
 	protected function execute(InputInterface $input, OutputInterface $output) {
 		$principalBackend = new Principal(
 				$this->config,
@@ -72,6 +76,7 @@ class SyncSystemAddressBook extends Command {
 				$userId = $user->getUID();
 				$displayName = $user->getDisplayName();
 				$emailAddress = $user->getEMailAddress();
+				$cloudId = $user->getCloudId();
 				$image = $user->getAvatarImage(-1);
 
 				$cardId = "$name:$userId.vcf";
@@ -81,6 +86,7 @@ class SyncSystemAddressBook extends Command {
 					$vCard->add(new Text($vCard, 'UID', $userId));
 					$vCard->add(new Text($vCard, 'FN', $displayName));
 					$vCard->add(new Text($vCard, 'EMAIL', $emailAddress));
+					$vCard->add(new Text($vCard, 'CLOUD', $cloudId));
 					if ($image) {
 						$vCard->add('PHOTO', $image->data(), ['ENCODING' => 'b', 'TYPE' => $image->mimeType()]);
 					}
diff --git a/apps/files_sharing/lib/helper.php b/apps/files_sharing/lib/helper.php
index a804737c49..391b491e1f 100644
--- a/apps/files_sharing/lib/helper.php
+++ b/apps/files_sharing/lib/helper.php
@@ -310,20 +310,4 @@ class Helper {
 		\OC::$server->getConfig()->setSystemValue('share_folder', $shareFolder);
 	}
 
-	/**
-	 * remove protocol from URL
-	 *
-	 * @param string $url
-	 * @return string
-	 */
-	public static function removeProtocolFromUrl($url) {
-		if (strpos($url, 'https://') === 0) {
-			return substr($url, strlen('https://'));
-		} else if (strpos($url, 'http://') === 0) {
-			return substr($url, strlen('http://'));
-		}
-
-		return $url;
-	}
-
 }
diff --git a/apps/files_sharing/settings-personal.php b/apps/files_sharing/settings-personal.php
index deaa7b92ac..85fad9c3ea 100644
--- a/apps/files_sharing/settings-personal.php
+++ b/apps/files_sharing/settings-personal.php
@@ -32,9 +32,7 @@ if (count($matches) > 0 && $matches[1] <= 9) {
 	$isIE8 = true;
 }
 
-$uid = \OC::$server->getUserSession()->getUser()->getUID();
-$server = \OC::$server->getURLGenerator()->getAbsoluteURL('/');
-$cloudID = $uid . '@' . rtrim(\OCA\Files_Sharing\Helper::removeProtocolFromUrl($server), '/');
+$cloudID = \OC::$server->getUserSession()->getUser()->getCloudId();
 $url = 'https://owncloud.org/federation#' . $cloudID;
 $ownCloudLogoPath = \OC::$server->getURLGenerator()->imagePath('core', 'logo-icon.svg');
 
diff --git a/lib/private/user/user.php b/lib/private/user/user.php
index 023fc5f5a3..ca79f12469 100644
--- a/lib/private/user/user.php
+++ b/lib/private/user/user.php
@@ -32,60 +32,48 @@ namespace OC\User;
 use OC\Hooks\Emitter;
 use OCP\IAvatarManager;
 use OCP\IImage;
+use OCP\IURLGenerator;
 use OCP\IUser;
 use OCP\IConfig;
 
 class User implements IUser {
-	/**
-	 * @var string $uid
-	 */
+	/** @var string $uid */
 	private $uid;
 
-	/**
-	 * @var string $displayName
-	 */
+	/** @var string $displayName */
 	private $displayName;
 
-	/**
-	 * @var \OC_User_Interface $backend
-	 */
+	/** @var \OC_User_Interface $backend */
 	private $backend;
 
-	/**
-	 * @var bool $enabled
-	 */
+	/** @var bool $enabled */
 	private $enabled;
 
-	/**
-	 * @var Emitter|Manager $emitter
-	 */
+	/** @var Emitter|Manager $emitter */
 	private $emitter;
 
-	/**
-	 * @var string $home
-	 */
+	/** @var string $home */
 	private $home;
 
-	/**
-	 * @var int $lastLogin
-	 */
+	/** @var int $lastLogin */
 	private $lastLogin;
 
-	/**
-	 * @var \OCP\IConfig $config
-	 */
+	/** @var \OCP\IConfig $config */
 	private $config;
 
 	/** @var IAvatarManager */
 	private $avatarManager;
 
+	/** @var IURLGenerator */
+	private $urlGenerator;
+
 	/**
 	 * @param string $uid
 	 * @param \OC_User_Interface $backend
 	 * @param \OC\Hooks\Emitter $emitter
 	 * @param \OCP\IConfig $config
 	 */
-	public function __construct($uid, $backend, $emitter = null, IConfig $config = null, $avatarManager = null) {
+	public function __construct($uid, $backend, $emitter = null, IConfig $config = null, $avatarManager = null, $urlGenerator = null) {
 		$this->uid = $uid;
 		$this->backend = $backend;
 		$this->emitter = $emitter;
@@ -102,6 +90,9 @@ class User implements IUser {
 		if (is_null($this->avatarManager)) {
 			$this->avatarManager = \OC::$server->getAvatarManager();
 		}
+		if (is_null($this->urlGenerator)) {
+			$this->urlGenerator = \OC::$server->getURLGenerator();
+		}
 	}
 
 	/**
@@ -342,4 +333,30 @@ class User implements IUser {
 
 		return null;
 	}
+
+	/**
+	 * get the federation cloud id
+	 *
+	 * @return string
+	 * @since 9.0.0
+	 */
+	public function getCloudId() {
+		$uid = $this->getUID();
+		$server = $this->urlGenerator->getAbsoluteURL('/');
+		return $uid . '@' . rtrim( $this->removeProtocolFromUrl($server), '/');
+	}
+
+	/**
+	 * @param string $url
+	 * @return string
+	 */
+	private function removeProtocolFromUrl($url) {
+		if (strpos($url, 'https://') === 0) {
+			return substr($url, strlen('https://'));
+		} else if (strpos($url, 'http://') === 0) {
+			return substr($url, strlen('http://'));
+		}
+
+		return $url;
+	}
 }
diff --git a/lib/public/iuser.php b/lib/public/iuser.php
index f6caef2ba1..67e2b107e0 100644
--- a/lib/public/iuser.php
+++ b/lib/public/iuser.php
@@ -161,4 +161,12 @@ interface IUser {
 	 * @since 9.0.0
 	 */
 	public function getAvatarImage($size);
+
+	/**
+	 * get the federation cloud id
+	 *
+	 * @return string
+	 * @since 9.0.0
+	 */
+	public function getCloudId();
 }
diff --git a/tests/lib/contacts/localadressbook.php b/tests/lib/contacts/localadressbook.php
index 5416832453..e5c4346083 100644
--- a/tests/lib/contacts/localadressbook.php
+++ b/tests/lib/contacts/localadressbook.php
@@ -102,4 +102,7 @@ class SimpleUserForTesting implements IUser {
 
 	public function getAvatarImage($size) {
 	}
+
+	public function getCloudId() {
+	}
 }