diff --git a/lib/group.php b/lib/group.php
index ed9482418b..8ebb698692 100644
--- a/lib/group.php
+++ b/lib/group.php
@@ -286,4 +286,33 @@ class OC_Group {
 		}
 		return $users;
 	}
+	
+	/**
+	 * @brief get a list of all display names in a group
+	 * @returns array with display names (key) and user ids(value)
+	 */
+	public static function displayNamesInGroup($gid, $search = '', $limit = -1, $offset = 0) {
+		$displayNames=array();
+		foreach(self::$_usedBackends as $backend) {
+			$displayNames = array_merge($backend->displayNamesInGroup($gid, $search, $limit, $offset), $displayNames);
+		}
+		return $displayNames;
+	}
+	
+	/**
+	 * @brief get a list of all display names in several groups
+	 * @param array $gids
+	 * @param string $search
+	 * @param int $limit
+	 * @param int $offset
+	 * @return array with display names (Key) user ids (value)
+	 */
+	public static function displayNamesInGroups($gids, $search = '', $limit = -1, $offset = 0) {
+		$displayNames = array();
+		foreach ($gids as $gid) {
+			// TODO Need to apply limits to groups as total
+			$displayNames = array_merge(array_diff(self::displayNamesInGroup($gid, $search, $limit, $offset), $displayNames), $displayNames);
+		}
+		return $displayNames;
+	}
 }
diff --git a/lib/group/backend.php b/lib/group/backend.php
index 9ff432d066..ceb2d9242d 100644
--- a/lib/group/backend.php
+++ b/lib/group/backend.php
@@ -133,5 +133,23 @@ abstract class OC_Group_Backend implements OC_Group_Interface {
 	public function usersInGroup($gid, $search = '', $limit = -1, $offset = 0) {
 		return array();
 	}
+	
+	/**
+	 * @brief get a list of all display names in a group
+	 * @param string $gid
+	 * @param string $search
+	 * @param int $limit
+	 * @param int $offset
+	 * @return array with display names (key) and user ids (value)
+	 */
+	public function DisplayNamesInGroup($gid, $search = '', $limit = -1, $offset = 0) {
+		$displayNames = '';
+		$users = $this->usersInGroup($gid, $search, $limit, $offset);
+		foreach ( $users as $user ) {
+			$DisplayNames[$user] = $user;
+		}
+			
+		return $DisplayNames;
+	}
 
 }
diff --git a/lib/public/user.php b/lib/public/user.php
index 3a2f4d02f5..a93e3a674a 100644
--- a/lib/public/user.php
+++ b/lib/public/user.php
@@ -62,9 +62,9 @@ class User {
 	
 	/**
 	 * @brief Get a list of all display names
-	 * @returns array with all display names and the correspondig uids
+	 * @returns array with all display names (key) and the correspondig uids (value)
 	 *
-	 * Get a list of all display names.
+	 * Get a list of all display names and user ids.
 	 */
 	public static function getDisplayNames($search = '', $limit = null, $offset = null) {
 		return \OC_USER::getDisplayNames($search, $limit, $offset);
diff --git a/lib/user.php b/lib/user.php
index f84b4c01df..4cdf07dc3f 100644
--- a/lib/user.php
+++ b/lib/user.php
@@ -460,9 +460,9 @@ class OC_User {
 	
 	/**
 	 * @brief Get a list of all users display name
-	 * @returns associative array with all display names and corresponding uids
+	 * @returns associative array with all display names (key) and corresponding uids (value)
 	 *
-	 * Get a list of all users.
+	 * Get a list of all display names and user ids.
 	 */
 	public static function getDisplayNames($search = '', $limit = null, $offset = null) {
 		$displayNames = array();
diff --git a/lib/user/backend.php b/lib/user/backend.php
index 5823e39040..ec43d7f187 100644
--- a/lib/user/backend.php
+++ b/lib/user/backend.php
@@ -134,9 +134,9 @@ abstract class OC_User_Backend implements OC_User_Interface {
 	
 	/**
 	 * @brief Get a list of all display names
-	 * @returns array with  all displayNames and the correspondig uids
+	 * @returns array with  all displayNames (key) and the correspondig uids (value)
 	 *
-	 * Get a list of all display names.
+	 * Get a list of all display names and user ids.
 	 */
 	public function getDisplayNames($search = '', $limit = null, $offset = null) {
 		$displayNames = array();
diff --git a/settings/users.php b/settings/users.php
index 3706dc918c..bf27e80441 100644
--- a/settings/users.php
+++ b/settings/users.php
@@ -26,7 +26,7 @@ if($isadmin) {
 	$subadmins = OC_SubAdmin::getAllSubAdmins();
 }else{
 	$accessiblegroups = OC_SubAdmin::getSubAdminsGroups(OC_User::getUser());
-	$accessibleusers = OC_Group::usersInGroups($accessiblegroups, '', 30);
+	$accessibleusers = OC_Group::displayNamesInGroups($accessiblegroups, '', 30);
 	$subadmins = false;
 }