diff --git a/addressbook/templates/default/index.xet b/addressbook/templates/default/index.xet
index b418f374e6..abe112860d 100644
--- a/addressbook/templates/default/index.xet
+++ b/addressbook/templates/default/index.xet
@@ -23,6 +23,7 @@
 				<column width="50"/>
 				<column width="80" disabled="@no_event_column"/>
 				<column width="120"/>
+				<column width="120"/>
 			</columns>
 			<rows>
 				<row class="th">
@@ -99,6 +100,7 @@
 						<nextmatch-sortheader label="Created" id="contact_created" sortmode="DESC"/>
 						<nextmatch-sortheader label="Last modified" id="contact_modified" sortmode="DESC"/>
 					</et2-vbox>
+					<nextmatch-sortheader label="Username" id="account_lid" sortmode="ASC"/>
 				</row>
 				<row class="$row_cont[class] $row_cont[cat_id]" valign="top">
 					<et2-image  align="center" label="$row_cont[type_label]" src="$row_cont[type]" noLang="1" style="font-size: 22px"/>
@@ -171,6 +173,7 @@
 						<et2-date-time  id="${row}[modified]" readonly="true" class="noBreak"></et2-date-time>
 						<et2-select-account  id="${row}[modifier]" readonly="true"></et2-select-account>
 					</et2-vbox>
+					<et2-description id="${row}[account_lid]"></et2-description>
 				</row>
 			</rows>
 		</grid>
diff --git a/api/src/Contacts/Ldap.php b/api/src/Contacts/Ldap.php
index 7914f20579..72939dea15 100644
--- a/api/src/Contacts/Ldap.php
+++ b/api/src/Contacts/Ldap.php
@@ -134,6 +134,7 @@ class Ldap
 	var $schema2egw = array(
 		'posixaccount' => array(
 			'account_id'	=> 'uidnumber',
+			'account_lid'   => 'uid',
 			'shadowexpire',
 		),
 		'inetorgperson' => array(
@@ -199,6 +200,7 @@ class Ldap
 			'pubkey'		=> 'usersmimecertificate',
 			'uid'			=> 'objectguid',
 			'id'			=> 'objectguid',
+			'account_lid'   => 'samaccountname',
 		],
 		#displayName
 		#mozillaCustom1
diff --git a/api/src/Contacts/Sql.php b/api/src/Contacts/Sql.php
index 554e34057a..46cdd55109 100644
--- a/api/src/Contacts/Sql.php
+++ b/api/src/Contacts/Sql.php
@@ -607,6 +607,7 @@ class Sql extends Api\Storage
 			strpos($join,$GLOBALS['egw']->accounts->backend->table) === false && !array_key_exists('account_id',$filter))
 		{
 			$join .= self::ACCOUNT_ACTIVE_JOIN;
+			$extra_cols[] = 'account_lid AS account_lid';
 			if ($GLOBALS['egw_info']['user']['preferences']['addressbook']['hide_accounts'] === '0')
 			{
 				$filter[] = str_replace('UNIX_TIMESTAMP(NOW())',time(),self::ACOUNT_ACTIVE_FILTER);