diff --git a/addressbook/inc/class.addressbook_ui.inc.php b/addressbook/inc/class.addressbook_ui.inc.php
index edab2bb28e..e25c6537de 100644
--- a/addressbook/inc/class.addressbook_ui.inc.php
+++ b/addressbook/inc/class.addressbook_ui.inc.php
@@ -1504,8 +1504,8 @@ window.egw_LAB.wait(function() {
 		{
 			$query['col_filter']['account_id'] = null;
 		}
-		// enable/disable distribution lists depending on backend
-		$query['no_filter2'] = !$this->lists_available($query['filter']);
+		// all backends allow now at least to use groups as distribution lists
+		$query['no_filter2'] = false;
 
 		if (isset($this->org_views[(string) $query['org_view']]) && !$query['col_filter']['parent_id'])	// we have an org view
 		{
diff --git a/api/src/Contacts/Ads.php b/api/src/Contacts/Ads.php
index 435abd50fe..b3cc8a771c 100644
--- a/api/src/Contacts/Ads.php
+++ b/api/src/Contacts/Ads.php
@@ -223,4 +223,20 @@ class Ads extends Ldap
 
 		parent::sanitize_update($ldapContact);
 	}
+
+	/**
+	 * Return a LDAP filter by group membership
+	 *
+	 * @param int $gid gidNumber (< 0 as used in EGroupware!)
+	 * @return string filter or '' if $gid not < 0
+	 */
+	function membershipFilter($gid)
+	{
+		$filter = '';
+		if ($gid < 0 && ($dn = $GLOBALS['egw']->accounts->id2name($gid, 'account_dn')))
+		{
+			$filter .= '(memberOf='.$dn.')';
+		}
+		return $filter;
+	}
 }
diff --git a/api/src/Contacts/Ldap.php b/api/src/Contacts/Ldap.php
index 09e1769c99..a399fa1358 100644
--- a/api/src/Contacts/Ldap.php
+++ b/api/src/Contacts/Ldap.php
@@ -973,6 +973,10 @@ class Ldap
 					$filters .= $this->ids_filter($value);
 					break;
 
+				case 'list':
+					$filter .= $this->membershipFilter($value);
+					break;
+
 				default:
 					$matches = null;
 					if (!is_int($key))
@@ -1009,6 +1013,28 @@ class Ldap
 		return $filters;
 	}
 
+	/**
+	 * Return a LDAP filter by group membership
+	 *
+	 * @param int $gid gidNumber (< 0 as used in EGroupware!)
+	 * @return string filter or '' if $gid not < 0
+	 */
+	function membershipFilter($gid)
+	{
+		$filter = '';
+		if ($gid < 0)
+		{
+			$filter .= '(|';
+			// unfortunately we have no group-membership attribute in LDAP, like in AD
+			foreach($GLOBALS['egw']->accounts->members($gid, true) as $account_id)
+			{
+				$filter .= '(uidNumber='.(int)$account_id.')';
+			}
+			$filter .= ')';
+		}
+		return $filter;
+	}
+
 	/**
 	 * Perform the actual ldap-search, retrieve and convert all entries
 	 *
diff --git a/api/src/Contacts/Sql.php b/api/src/Contacts/Sql.php
index 098072df47..c09837a76c 100644
--- a/api/src/Contacts/Sql.php
+++ b/api/src/Contacts/Sql.php
@@ -346,8 +346,16 @@ class Sql extends Api\Storage
 		}
 		if (isset($filter['list']))
 		{
-			$join .= " JOIN $this->ab2list_table ON $this->table_name.contact_id=$this->ab2list_table.contact_id AND ".
-				$this->db->expression($this->ab2list_table, array('list_id' => $filter['list']));
+			if ($filter['list'] < 0)
+			{
+				$join .= " JOIN egw_acl ON $this->table_name.account_id=acl_account AND acl_appname='phpgw_group' AND ".
+					$this->db->expression('egw_acl', array('acl_location' => $filter['list']));
+			}
+			else
+			{
+				$join .= " JOIN $this->ab2list_table ON $this->table_name.contact_id=$this->ab2list_table.contact_id AND ".
+					$this->db->expression($this->ab2list_table, array('list_id' => $filter['list']));
+			}
 			unset($filter['list']);
 		}
 		// add join to show only active accounts (only if accounts are shown and in sql and we not already join the accounts table, eg. used by admin)
@@ -551,6 +559,28 @@ class Sql extends Api\Storage
 				$lists[$row['list_id']]['members'][] = $row[$member_attr];
 			}
 		}
+		/* groups as list are implemented currently in Contacts\Storage::get_lists() for all backends
+		if ($uid_column == 'list_owner' && in_array(0, (array)$uids) && (!$limit_in_ab || in_array(0, (array)$limit_in_ab)))
+		{
+			foreach($GLOBALS['egw']->accounts->search(array(
+				'type' => 'groups'
+			)) as $account_id => $group)
+			{
+				$list = array(
+					'list_id' => $account_id,
+					'list_name' => Api\Accounts::format_username($group['account_lid'], '', '', $account_id),
+					'list_owner' => 0,
+					'list_uid' => 'group'.$account_id,
+					'list_carddav_name' => 'group'.$account_id.'.vcf',
+					'list_etag' => md5(json_encode($GLOBALS['egw']->accounts->members($account_id, true)))
+				);
+				if ($member_attr)
+				{
+					$list['members'] = array();	// ToDo
+				}
+				$lists[(string)$account_id] = $list;
+			}
+		}*/
 		//error_log(__METHOD__.'('.array2string($uids).", '$uid_column', '$member_attr') returning ".array2string($lists));
 		return $lists;
 	}
diff --git a/api/src/Contacts/Storage.php b/api/src/Contacts/Storage.php
index 30a590cafd..f83eeeb73c 100755
--- a/api/src/Contacts/Storage.php
+++ b/api/src/Contacts/Storage.php
@@ -1012,26 +1012,40 @@ class Storage
 	 */
 	function get_lists($required=Api\Acl::READ,$extra_labels=null)
 	{
-		if (!method_exists($this->somain,'get_lists')) return false;
-
-		$uids = array();
-		foreach($this->grants as $uid => $rights)
-		{
-			if (($rights & $required) == $required)
-			{
-				$uids[] = $uid;
-			}
-		}
 		$lists = is_array($extra_labels) ? $extra_labels : array();
 
-		foreach($this->somain->get_lists($uids) as $list_id => $data)
+		if (method_exists($this->somain,'get_lists'))
 		{
-			$lists[$list_id] = $data['list_name'];
-			if ($data['list_owner'] != $this->user)
+			$uids = array();
+			foreach($this->grants as $uid => $rights)
 			{
-				$lists[$list_id] .= ' ('.Api\Accounts::username($data['list_owner']).')';
+				// only requests groups / list in accounts addressbook for read
+				if (!$uid && $required != Api\Acl::READ) continue;
+
+				if (($rights & $required) == $required)
+				{
+					$uids[] = $uid;
+				}
+			}
+
+			foreach($this->somain->get_lists($uids) as $list_id => $data)
+			{
+				$lists[$list_id] = $data['list_name'];
+				if ($data['list_owner'] != $this->user)
+				{
+					$lists[$list_id] .= ' ('.Api\Accounts::username($data['list_owner']).')';
+				}
 			}
 		}
+
+		// add groups for all backends
+		foreach($GLOBALS['egw']->accounts->search(array(
+			'type' => 'groups'
+		)) as $account_id => $group)
+		{
+			$lists[(string)$account_id] = Api\Accounts::format_username($group['account_lid'], '', '', $account_id);
+		}
+
 		return $lists;
 	}