diff --git a/apps/dav/appinfo/application.php b/apps/dav/appinfo/application.php
index 7a201e1dd7..ea9e1ad8f7 100644
--- a/apps/dav/appinfo/application.php
+++ b/apps/dav/appinfo/application.php
@@ -69,7 +69,8 @@ class Application extends App {
 			/** @var IAppContainer $c */
 			return new SyncService(
 				$c->query('CardDavBackend'),
-				$c->getServer()->getUserManager()
+				$c->getServer()->getUserManager(),
+				$c->getServer()->getLogger()
 			);
 		});
 
diff --git a/apps/dav/lib/carddav/syncservice.php b/apps/dav/lib/carddav/syncservice.php
index 4b5907620e..2e7397fc70 100644
--- a/apps/dav/lib/carddav/syncservice.php
+++ b/apps/dav/lib/carddav/syncservice.php
@@ -21,11 +21,14 @@
 
 namespace OCA\DAV\CardDAV;
 
+use OCP\AppFramework\Http;
+use OCP\ILogger;
 use OCP\IUser;
 use OCP\IUserManager;
 use Sabre\DAV\Client;
 use Sabre\DAV\Xml\Response\MultiStatus;
 use Sabre\DAV\Xml\Service;
+use Sabre\HTTP\ClientHttpException;
 use Sabre\VObject\Reader;
 
 class SyncService {
@@ -36,12 +39,16 @@ class SyncService {
 	/** @var IUserManager */
 	private $userManager;
 
+	/** @var ILogger */
+	private $logger;
+
 	/** @var array */
 	private $localSystemAddressBook;
 
-	public function __construct(CardDavBackend $backend, IUserManager $userManager) {
+	public function __construct(CardDavBackend $backend, IUserManager $userManager, ILogger $logger) {
 		$this->backend = $backend;
 		$this->userManager = $userManager;
+		$this->logger = $logger;
 	}
 
 	/**
@@ -53,6 +60,7 @@ class SyncService {
 	 * @param string $targetPrincipal
 	 * @param array $targetProperties
 	 * @return string
+	 * @throws \Exception
 	 */
 	public function syncRemoteAddressBook($url, $userName, $sharedSecret, $syncToken, $targetBookId, $targetPrincipal, $targetProperties) {
 		// 1. create addressbook
@@ -60,7 +68,16 @@ class SyncService {
 		$addressBookId = $book['id'];
 
 		// 2. query changes
-		$response = $this->requestSyncReport($url, $userName, $sharedSecret, $syncToken);
+		try {
+			$response = $this->requestSyncReport($url, $userName, $sharedSecret, $syncToken);
+		} catch (ClientHttpException $ex) {
+			if ($ex->getCode() === Http::STATUS_UNAUTHORIZED) {
+				// remote server revoked access to the address book, remove it
+				$this->backend->deleteAddressBook($addressBookId);
+				$this->logger->info('Authorization failed, remove address book: ' . $url, ['app' => 'dav']);
+				throw $ex;
+			}
+		}
 
 		// 3. apply changes
 		// TODO: use multi-get for download
diff --git a/apps/dav/tests/unit/carddav/syncservicetest.php b/apps/dav/tests/unit/carddav/syncservicetest.php
index a6af98f7e8..7652afdc22 100644
--- a/apps/dav/tests/unit/carddav/syncservicetest.php
+++ b/apps/dav/tests/unit/carddav/syncservicetest.php
@@ -68,13 +68,15 @@ class SyncServiceTest extends TestCase {
 
 		/** @var IUserManager $userManager */
 		$userManager = $this->getMockBuilder('OCP\IUserManager')->disableOriginalConstructor()->getMock();
-		$ss = new SyncService($backend, $userManager);
+		$logger = $this->getMockBuilder('OCP\ILogger')->disableOriginalConstructor()->getMock();
+		$ss = new SyncService($backend, $userManager, $logger);
 		$book = $ss->ensureSystemAddressBookExists('principals/users/adam', 'contacts', []);
 	}
 
 	public function testUpdateAndDeleteUser() {
 		/** @var CardDavBackend | \PHPUnit_Framework_MockObject_MockObject $backend */
 		$backend = $this->getMockBuilder('OCA\DAV\CardDAV\CardDAVBackend')->disableOriginalConstructor()->getMock();
+		$logger = $this->getMockBuilder('OCP\ILogger')->disableOriginalConstructor()->getMock();
 
 		$backend->expects($this->once())->method('createCard');
 		$backend->expects($this->once())->method('updateCard');
@@ -92,7 +94,7 @@ class SyncServiceTest extends TestCase {
 		$user->method('getBackendClassName')->willReturn('unittest');
 		$user->method('getUID')->willReturn('test-user');
 
-		$ss = new SyncService($backend, $userManager);
+		$ss = new SyncService($backend, $userManager, $logger);
 		$ss->updateUser($user);
 
 		$user->method('getDisplayName')->willReturn('A test user for unit testing');
@@ -123,8 +125,9 @@ class SyncServiceTest extends TestCase {
 	 */
 	private function getSyncServiceMock($backend, $response) {
 		$userManager = $this->getMockBuilder('OCP\IUserManager')->disableOriginalConstructor()->getMock();
+		$logger = $this->getMockBuilder('OCP\ILogger')->disableOriginalConstructor()->getMock();
 		/** @var SyncService | \PHPUnit_Framework_MockObject_MockObject $ss */
-		$ss = $this->getMock('OCA\DAV\CardDAV\SyncService', ['ensureSystemAddressBookExists', 'requestSyncReport', 'download'], [$backend, $userManager]);
+		$ss = $this->getMock('OCA\DAV\CardDAV\SyncService', ['ensureSystemAddressBookExists', 'requestSyncReport', 'download'], [$backend, $userManager, $logger]);
 		$ss->method('requestSyncReport')->withAnyParameters()->willReturn(['response' => $response, 'token' => 'sync-token-1']);
 		$ss->method('ensureSystemAddressBookExists')->willReturn(['id' => 1]);
 		$ss->method('download')->willReturn([
diff --git a/apps/federation/command/syncfederationaddressbooks.php b/apps/federation/command/syncfederationaddressbooks.php
index 61703d9d4e..72d12e59b2 100644
--- a/apps/federation/command/syncfederationaddressbooks.php
+++ b/apps/federation/command/syncfederationaddressbooks.php
@@ -40,6 +40,7 @@ class SyncFederationAddressBooks extends Command {
 		$this->syncService->syncThemAll(function($url, $ex) use ($progress, $output) {
 			if ($ex instanceof \Exception) {
 				$output->writeln("Error while syncing $url : " . $ex->getMessage());
+
 			} else {
 				$progress->advance();
 			}
diff --git a/apps/federation/lib/syncfederationaddressbooks.php b/apps/federation/lib/syncfederationaddressbooks.php
index 886f6505b2..f9cee9a713 100644
--- a/apps/federation/lib/syncfederationaddressbooks.php
+++ b/apps/federation/lib/syncfederationaddressbooks.php
@@ -3,6 +3,7 @@
 namespace OCA\Federation;
 
 use OCA\DAV\CardDAV\SyncService;
+use OCP\AppFramework\Http;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Helper\ProgressBar;
 use Symfony\Component\Console\Input\InputInterface;
@@ -51,6 +52,9 @@ class SyncFederationAddressBooks {
 					$this->dbHandler->setServerStatus($url, TrustedServers::STATUS_OK, $newToken);
 				}
 			} catch (\Exception $ex) {
+				if ($ex->getCode() === Http::STATUS_UNAUTHORIZED) {
+					$this->dbHandler->setServerStatus($url, TrustedServers::STATUS_ACCESS_REVOKED);
+				}
 				$callback($url, $ex);
 			}
 		}
diff --git a/apps/federation/lib/trustedservers.php b/apps/federation/lib/trustedservers.php
index fed6b0944a..3d515f24a7 100644
--- a/apps/federation/lib/trustedservers.php
+++ b/apps/federation/lib/trustedservers.php
@@ -41,6 +41,8 @@ class TrustedServers {
 	const STATUS_PENDING = 2;
 	/** something went wrong, misconfigured server, software bug,... user interaction needed */
 	const STATUS_FAILURE = 3;
+	/** remote server revoked access */
+	const STATUS_ACCESS_REVOKED = 4;
 
 	/** @var  dbHandler */
 	private $dbHandler;
diff --git a/apps/federation/templates/settings-admin.php b/apps/federation/templates/settings-admin.php
index 854bb74417..77c552ee78 100644
--- a/apps/federation/templates/settings-admin.php
+++ b/apps/federation/templates/settings-admin.php
@@ -26,7 +26,11 @@ style('federation', 'settings-admin')
 			<li id="<?php p($trustedServer['id']); ?>" class="icon-delete">
 				<?php if((int)$trustedServer['status'] === TrustedServers::STATUS_OK) { ?>
 					<span class="status success"></span>
-				<?php } elseif((int)$trustedServer['status'] === TrustedServers::STATUS_PENDING) { ?>
+				<?php
+				} elseif(
+					(int)$trustedServer['status'] === TrustedServers::STATUS_PENDING ||
+					(int)$trustedServer['status'] === TrustedServers::STATUS_ACCESS_REVOKED
+				) { ?>
 					<span class="status indeterminate"></span>
 				<?php } else {?>
 					<span class="status error"></span>