diff --git a/ajax/settings.php b/ajax/settings.php
index 9dd32dd..f040dba 100644
--- a/ajax/settings.php
+++ b/ajax/settings.php
@@ -75,20 +75,40 @@ if(isset($_POST['appname']) && ($_POST['appname'] === 'user_sql') && isset($_POS
                             'data' => array('message' => $l -> t('The selected SQL table '.$_POST['sql_table'].' does not exist!'))));
                 break;
             }
+            if(!empty($_POST['sql_group_table']) && !$helper->verifyTable($parameters, $_POST['sql_driver'], $_POST['sql_group_table']))
+            {
+                $response->setData(array('status' => 'error',
+                            'data' => array('message' => $l -> t('The selected SQL table '.$_POST['sql_group_table'].' does not exist!'))));
+                break;
+            }
             
             // Retrieve all column settings
             $columns = array();
+            $group_columns = array();
             foreach($params as $param)
             {
                 if(strpos($param, 'col_') === 0)
                 {
                     if(isset($_POST[$param]) && $_POST[$param] !== '')
-                        $columns[] = $_POST[$param];
+                    {
+                        if(strpos($param, 'col_group_') === 0)
+                        {
+                            $group_columns[] = $_POST[$param];
+                        }
+                        else
+                        {
+                            $columns[] = $_POST[$param];
+                        }
+                    }
                 }
             }
 
             // Check if the columns exist
             $status = $helper->verifyColumns($parameters, $_POST['sql_driver'], $_POST['sql_table'], $columns);
+            if(!empty($_POST['sql_group_table']) && $status === true)
+            {
+                $status = $helper->verifyColumns($parameters, $_POST['sql_driver'], $_POST['sql_group_table'], $group_columns);
+            }
             if($status !== true)
             {
                 $response->setData(array('status' => 'error',
diff --git a/appinfo/app.php b/appinfo/app.php
index 2617fb9..28ac922 100644
--- a/appinfo/app.php
+++ b/appinfo/app.php
@@ -22,10 +22,13 @@
 */
 
 require_once __DIR__ . '/../user_sql.php';
+require_once __DIR__ . '/../group_sql.php';
 \OCP\App::registerAdmin('user_sql','settings');
 
 $backend = new \OCA\user_sql\OC_USER_SQL;
+$group_backend = new \OCA\user_sql\OC_GROUP_SQL;
 
 
 // register user backend
 \OC_User::useBackend($backend);
+\OC::$server->getGroupManager()->addBackend($group_backend);
diff --git a/appinfo/info.xml b/appinfo/info.xml
index 2b557d1..d2b6911 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -15,5 +15,6 @@
        <category>auth</category>
        <dependencies>
            <nextcloud min-version="12" max-version="12"/>
+           <owncloud min-version="10" max-version="10"/>
        </dependencies>
 </info>
diff --git a/group_sql.php b/group_sql.php
new file mode 100644
index 0000000..08c8d76
--- /dev/null
+++ b/group_sql.php
@@ -0,0 +1,95 @@
+<?php
+
+namespace OCA\user_sql;
+
+use \OCA\user_sql\lib\Helper;
+
+class OC_GROUP_SQL extends \OC_Group_Backend implements \OCP\GroupInterface
+{
+    protected $settings;
+    protected $helper;
+
+    public function __construct()
+    {
+        $this -> helper = new \OCA\user_sql\lib\Helper();
+        $domain = \OC::$server->getRequest()->getServerHost();
+        $this -> settings = $this -> helper -> loadSettingsForDomain($domain);
+        $this -> helper -> connectToDb($this -> settings);        
+        return false;
+    }
+
+    public function getUserGroups($uid) {
+        if(empty($this -> settings['sql_group_table']))
+        {
+            \OCP\Util::writeLog('OC_USER_SQL', "Group table not configured", \OCP\Util::DEBUG);
+            return [];
+        }
+        $rows = $this -> helper -> runQuery('getUserGroups', array('uid' => $uid), false, true);
+        if($rows === false)
+        {
+            \OCP\Util::writeLog('OC_USER_SQL', "Found no group", \OCP\Util::DEBUG);
+            return [];
+        }
+        $groups = array();
+        foreach($rows as $row)
+        {
+            $groups[] = $row[$this -> settings['col_group_name']];
+        } 
+        return $groups;
+    }
+
+    public function getGroups($search = '', $limit = null, $offset = null) {
+        if(empty($this -> settings['sql_group_table']))
+        {
+            return [];
+        }
+        $search = "%".$search."%";
+        $rows = $this -> helper -> runQuery('getGroups', array('search' => $search), false, true, array('limit' => $limit, 'offset' => $offset));
+        if($rows === false)
+        {
+            return [];
+        }   
+        $groups = array();
+        foreach($rows as $row)
+        {
+            $groups[] = $row[$this -> settings['col_group_name']];
+        }   
+        return $groups;
+    }
+
+    public function usersInGroup($gid, $search = '', $limit = null, $offset = null) {
+        if(empty($this -> settings['sql_group_table']))
+        {
+            \OCP\Util::writeLog('OC_USER_SQL', "Group table not configured", \OCP\Util::DEBUG);
+            return [];
+        }
+        $rows = $this -> helper -> runQuery('getGroupUsers', array('gid' => $gid), false, true);
+        if($rows === false)
+        {
+            \OCP\Util::writeLog('OC_USER_SQL', "Found no users for group", \OCP\Util::DEBUG);
+            return [];
+        }
+        $users = array();
+        foreach($rows as $row)
+        {
+            $users[] = $row[$this -> settings['col_group_username']];
+        } 
+        return $users;
+    }
+
+    public function countUsersInGroup($gid, $search = '') {
+        if(empty($this -> settings['sql_group_table']))
+        {
+            return 0;
+        }
+        $search = "%".$search."%";
+        $count = $this -> helper -> runQuery('countUsersInGroup', array('gid' => $gid, 'search' => $search));
+        if($count === false)
+        {
+            return 0;
+        } else {
+            return intval(reset($count));
+        }
+    }
+}
+?>
diff --git a/js/settings.js b/js/settings.js
index b6c6f4a..a1f5869 100644
--- a/js/settings.js
+++ b/js/settings.js
@@ -17,7 +17,7 @@ user_sql.adminSettingsUI = function()
         $('#sqlDiv').tabs();
         
         // Attach auto-completion to all column fields
-        $('#col_username, #col_password, #col_displayname, #col_active, #col_email, #col_gethome').autocomplete({
+        $('#col_username, #col_password, #col_displayname, #col_active, #col_email, #col_gethome, #col_group_name, #col_group_username').autocomplete({
             source: function(request, response)
             {
                 var post = $('#sqlForm').serializeArray();
@@ -56,7 +56,7 @@ user_sql.adminSettingsUI = function()
         });        
         
         // Attach auto-completion to all table fields
-        $('#sql_table').autocomplete({
+        $('#sql_table, #sql_group_table').autocomplete({
             source: function(request, response)
             {
                 var post = $('#sqlForm').serializeArray();
diff --git a/lib/helper.php b/lib/helper.php
index 56931ed..bdd68dc 100644
--- a/lib/helper.php
+++ b/lib/helper.php
@@ -66,7 +66,10 @@ class Helper {
             'set_mail_sync_mode',
             'set_enable_gethome',
             'set_gethome_mode',
-            'set_gethome'
+            'set_gethome',
+            'sql_group_table',
+            'col_group_username',
+            'col_group_name'
         );
 
         return $params;
@@ -175,6 +178,22 @@ class Helper {
             case 'mysqlPassword':
                 $query = "SELECT PASSWORD(:pw);";
             break;
+
+            case 'getUserGroups':
+                $query = "SELECT ".$this->settings['col_group_name']." FROM ".$this->settings['sql_group_table']." WHERE ".$this->settings['col_group_username']." = :uid";
+            break;
+
+            case 'getGroups':
+                $query = "SELECT distinct ".$this->settings['col_group_name']." FROM ".$this->settings['sql_group_table']." WHERE ".$this->settings['col_group_name']." LIKE :search";
+            break;
+
+            case 'getGroupUsers':
+                $query = "SELECT distinct ".$this->settings['col_group_username']." FROM ".$this->settings['sql_group_table']." WHERE ".$this->settings['col_group_name']." = :gid";
+            break;
+
+            case 'countUsersInGroup':
+                $query = "SELECT count(".$this->settings['col_group_username'].") FROM ".$this->settings['sql_group_table']." WHERE ".$this->settings['col_group_name']." = :gid AND ".$this->settings['col_group_username']." LIKE :search";
+            break;
         }
 
         if(isset($limits['limit']) && $limits['limit'] !== null)
@@ -267,7 +286,7 @@ class Helper {
             if(!in_array($col, $columns, true))
             {
                 $res = false;
-                $err .= $col.' ';
+                $err .= $table.'.'.$col.' ';
             }
         }
         if($res)
@@ -301,13 +320,19 @@ class Helper {
         try {
             $conn = $cm -> getConnection($sql_driver, $parameters);
             $platform = $conn -> getDatabasePlatform();
-            $query = $platform -> getListTablesSQL();
-            $result = $conn -> executeQuery($query);
+
+            $queries = array(
+                'Tables_in_'.$parameters['dbname'] => $platform -> getListTablesSQL(),
+                'TABLE_NAME' => $platform -> getListViewsSQL($parameters['dbname']));
             $ret = array();
-            while($row = $result -> fetch())
+            foreach($queries as $field => $query)
             {
-                $name = $row['Tables_in_'.$parameters['dbname']];
-                $ret[] = $name;
+                $result = $conn -> executeQuery($query);
+                while($row = $result -> fetch())
+                {
+                    $name = $row[$field];
+                    $ret[] = $name;
+                }
             }
             return $ret;
         }
diff --git a/templates/settings.php b/templates/settings.php
index e2b1ad5..7fbdba9 100644
--- a/templates/settings.php
+++ b/templates/settings.php
@@ -21,6 +21,7 @@ $cfgClass = $ocVersion >= 7 ? 'section' : 'personalblock';
       <li><a id="sqlDomainSettings" href="#sql-4"><?php p($l -> t('Domain Settings')); ?></a></li>
       <li><a id="sqlGethomeSettings" href="#sql-5"><?php p($l -> t('getHome Settings')); ?></a></li>
       <li><a id="sqlSupervisorSettings" href="#sql-6"><?php p($l -> t('Supervisor Settings')); ?></a></li>
+      <li><a id="sqlGroupsSettings" href="#sql-7"><?php p($l -> t('Groups Settings')); ?></a></li>
     </ul>
 
         <fieldset id="sql-1">
@@ -165,6 +166,16 @@ $cfgClass = $ocVersion >= 7 ? 'section' : 'personalblock';
             <p><label for="supervisor"><?php p($l -> t('Supervisor username')); ?></label><input type="text" id="supervisor" name="supervisor" value="<?php p($_['supervisor']); ?>" /></p>
             <em><?php p($l -> t("Use supervisor username and target username separated by ';' to login as target user using supervisor's password (ex. superuser;user).")); ?></em></p>
         </fieldset>
+  
+        <fieldset id="sql-7">
+            <p><label for="sql_group_table"><?php p($l -> t('Table')); ?></label><input type="text" id="sql_group_table" name="sql_group_table" value="<?php p($_['sql_group_table']); ?>" /></p>
+            
+            <p><label for="col_group_username"><?php p($l -> t('Username Column')); ?></label><input type="text" id="col_group_username" name="col_group_username" value="<?php p($_['col_group_username']); ?>" /></p>
+            
+            <p><label for="col_group_name"><?php p($l -> t('Group Name Column')); ?></label><input type="text" id="col_group_name" name="col_group_name" value="<?php p($_['col_group_name']); ?>" /></p>
+            
+        </fieldset>
+
         <input type="hidden" name="requesttoken" value="<?php p($_['requesttoken']); ?>" id="requesttoken" />
         <input type="hidden" name="appname" value="user_sql" />
         <input id="sqlSubmit" type="submit" value="<?php p($l -> t('Save')); ?>" />
diff --git a/user_sql.php b/user_sql.php
index aacfee1..2009a15 100644
--- a/user_sql.php
+++ b/user_sql.php
@@ -31,7 +31,13 @@ namespace OCA\user_sql;
 
 use \OCA\user_sql\lib\Helper;
  
-class OC_USER_SQL extends \OC_User_Backend implements \OCP\IUserBackend, \OCP\UserInterface
+if(!interface_exists('OCP\\User\\IProvidesEMailBackend'))
+{
+   // hack for nextcloud
+   eval("namespace OCP\User; interface IProvidesEMailBackend {}");
+}
+
+class OC_USER_SQL extends \OC_User_Backend implements \OCP\IUserBackend, \OCP\UserInterface, \OCP\User\IProvidesEMailBackend
 {
     protected $cache;
     protected $settings;
@@ -116,6 +122,15 @@ class OC_USER_SQL extends \OC_User_Backend implements \OCP\IUserBackend, \OCP\Us
         return true;
     }
 
+    /**
+     * Only used by OwnCloud to get the email address
+     */
+    public function getEMailAddress($uid) {
+        $this->doEmailSync($uid);
+        $email = $this->ocConfig->getUserValue($uid, 'settings', 'email', '');
+        return $email;
+    }
+
     /**
      * This maps the username to the specified domain name.
      * It can only append a default domain name.
@@ -406,7 +421,7 @@ class OC_USER_SQL extends \OC_User_Backend implements \OCP\IUserBackend, \OCP\Us
         }
         else 
         {
-	       $search = "%".$this -> doUserDomainMapping("")."%";   
+            $search = "%".$this -> doUserDomainMapping("")."%";   
         }
         
         $rows = $this -> helper -> runQuery('getUsers', array('search' => $search), false, true, array('limit' => $limit, 'offset' => $offset));