diff --git a/lib/public/user.php b/lib/public/user.php
index 2d22bdd96c87ffe2936c5e1d78f3b0cc04223a82..3a2f4d02f5c214a96a1bbaf8b186c4353e91d0c7 100644
--- a/lib/public/user.php
+++ b/lib/public/user.php
@@ -60,6 +60,16 @@ class User {
 		return \OC_USER::getDisplayName();
 	}
 	
+	/**
+	 * @brief Get a list of all display names
+	 * @returns array with all display names and the correspondig uids
+	 *
+	 * Get a list of all display names.
+	 */
+	public static function getDisplayNames($search = '', $limit = null, $offset = null) {
+		return \OC_USER::getDisplayNames($search, $limit, $offset);
+	}
+	
 	/**
 	 * @brief Check if the user is logged in
 	 * @returns true/false
diff --git a/lib/user.php b/lib/user.php
index f9c8f48568e72e26e7d3414c69fd356225b8bcc0..f84b4c01df75f403cf19244ca5ef3841fac34cd3 100644
--- a/lib/user.php
+++ b/lib/user.php
@@ -457,6 +457,24 @@ class OC_User {
 		asort($users);
 		return $users;
 	}
+	
+	/**
+	 * @brief Get a list of all users display name
+	 * @returns associative array with all display names and corresponding uids
+	 *
+	 * Get a list of all users.
+	 */
+	public static function getDisplayNames($search = '', $limit = null, $offset = null) {
+		$displayNames = array();
+		foreach (self::$_usedBackends as $backend) {
+			$backendDisplayNames = $backend->getDisplayNames($search, $limit, $offset);
+			if (is_array($backendDisplayNames)) {
+				$displayNames = array_merge($displayNames, $backendDisplayNames);
+			}
+		}
+		ksort($displayNames);
+		return $displayNames;
+	}
 
 	/**
 	 * @brief check if a user exists
diff --git a/lib/user/backend.php b/lib/user/backend.php
index 47c92f5fe7b61942e4fd0477bf64082f0814c3c8..5823e3904061964ed02b314f9a25a382ccc1f497 100644
--- a/lib/user/backend.php
+++ b/lib/user/backend.php
@@ -131,4 +131,19 @@ abstract class OC_User_Backend implements OC_User_Interface {
 	public function getDisplayName($uid) {
 		return $uid;
 	}
+	
+	/**
+	 * @brief Get a list of all display names
+	 * @returns array with  all displayNames and the correspondig uids
+	 *
+	 * Get a list of all display names.
+	 */
+	public function getDisplayNames($search = '', $limit = null, $offset = null) {
+		$displayNames = array();
+		$users = $this->getUsers($search, $limit, $offset);
+		foreach ( $users as $user) {
+			$displayNames[$user] = $user;
+		}
+		return $displayNames;
+	}
 }
diff --git a/settings/users.php b/settings/users.php
index 668d974693ae7ce043567a80445533209924dde9..3706dc918c0d23669f671847a566845f4aecf2aa 100644
--- a/settings/users.php
+++ b/settings/users.php
@@ -22,7 +22,7 @@ $isadmin = OC_User::isAdminUser(OC_User::getUser());
 
 if($isadmin) {
 	$accessiblegroups = OC_Group::getGroups();
-	$accessibleusers = OC_User::getUsers('', 30);
+	$accessibleusers = OC_User::getDisplayNames('', 30);
 	$subadmins = OC_SubAdmin::getAllSubAdmins();
 }else{
 	$accessiblegroups = OC_SubAdmin::getSubAdminsGroups(OC_User::getUser());
@@ -42,16 +42,21 @@ $defaultQuota=OC_Appconfig::getValue('files', 'default_quota', 'none');
 $defaultQuotaIsUserDefined=array_search($defaultQuota, $quotaPreset)===false && array_search($defaultQuota, array('none', 'default'))===false;
 
 // load users and quota
-foreach($accessibleusers as $i) {
+foreach($accessibleusers as $displayName => $uid) {
 	$quota=OC_Preferences::getValue($i, 'files', 'quota', 'default');
 	$isQuotaUserDefined=array_search($quota, $quotaPreset)===false && array_search($quota, array('none', 'default'))===false;
 
+	$name = $displayName;
+	if ( $displayName != $uid ) {
+		$name = $name . ' ('.$uid.')';
+	} 
+	
 	$users[] = array(
-		"name" => $i,
-		"groups" => join( ", ", /*array_intersect(*/OC_Group::getUserGroups($i)/*, OC_SubAdmin::getSubAdminsGroups(OC_User::getUser()))*/),
+		"name" => $name,
+		"groups" => join( ", ", /*array_intersect(*/OC_Group::getUserGroups($uid)/*, OC_SubAdmin::getSubAdminsGroups(OC_User::getUser()))*/),
 		'quota'=>$quota,
 		'isQuotaUserDefined'=>$isQuotaUserDefined,
-		'subadmin'=>implode(', ', OC_SubAdmin::getSubAdminsGroups($i)));
+		'subadmin'=>implode(', ', OC_SubAdmin::getSubAdminsGroups($iuid)));
 }
 
 foreach( $accessiblegroups as $i ) {