diff --git a/autotest.cmd b/autotest.cmd
index 053860db54..a511faef9c 100644
--- a/autotest.cmd
+++ b/autotest.cmd
@@ -4,14 +4,14 @@
 :: @author Thomas Müller
 :: @author Tobias Ramforth (translated into Windows batch file)
 ::
-:: @copyright 2012 Thomas Müller thomas.mueller@tmit.eu
+:: @copyright 2012, 2013 Thomas Müller thomas.mueller@tmit.eu
 ::
 @echo off
 
 set DATADIR=data-autotest
 set BASEDIR=%~dp0
 
-:: create autoconfig for sqlite, mysql and postgresql
+:: create autoconfig for sqlite, mysql, postgresql and mssql
 echo ^<?php                                      > .\tests\autoconfig-sqlite.php
 echo $AUTOCONFIG ^= array ^(                     >> .\tests\autoconfig-sqlite.php
 echo  'installed' ^=^> false^,                   >> .\tests\autoconfig-sqlite.php
@@ -50,16 +50,35 @@ echo   'dbhost' ^=^> 'localhost'^,               >> .\tests\autoconfig-pgsql.php
 echo   'dbpass' ^=^> 'owncloud'^,                >> .\tests\autoconfig-pgsql.php
 echo ^)^;                                        >> .\tests\autoconfig-pgsql.php
 
+echo ^<?php                                      > .\tests\autoconfig-mssql.php
+echo $AUTOCONFIG ^= array ^(                     >> .\tests\autoconfig-mssql.php
+echo   'installed' ^=^> false^,                  >> .\tests\autoconfig-mssql.php
+echo   'dbtype' ^=^> 'mssql'^,                   >> .\tests\autoconfig-mssql.php
+echo   'dbtableprefix' ^=^> 'oc_'^,              >> .\tests\autoconfig-mssql.php
+echo   'adminlogin' ^=^> 'admin'^,               >> .\tests\autoconfig-mssql.php
+echo   'adminpass' ^=^> 'admin'^,                >> .\tests\autoconfig-mssql.php
+echo   'directory' ^=^> '%BASEDIR%%DATADIR%'^,   >> .\tests\autoconfig-mssql.php
+echo   'dbuser' ^=^> 'oc_autotest'^,             >> .\tests\autoconfig-mssql.php
+echo   'dbname' ^=^> 'oc_autotest'^,             >> .\tests\autoconfig-mssql.php
+echo   'dbhost' ^=^> 'localhost\sqlexpress'^,    >> .\tests\autoconfig-mssql.php
+echo   'dbpass' ^=^> 'owncloud'^,                >> .\tests\autoconfig-mssql.php
+echo ^)^;                                        >> .\tests\autoconfig-mssql.php
+
 echo localhost:5432:*:oc_autotest:owncloud > %APPDATA%\postgresql\pgpass.conf
 
 ::
 :: start test execution
 ::
-::call:execute_tests "sqlite"
-call:execute_tests "mysql"
-::call:execute_tests "mssql"
-::call:execute_tests "ora"
-::call:execute_tests "pgsql"
+if [%1] == [] (
+	echo "Running on all database backends"
+	call:execute_tests "sqlite"
+	call:execute_tests "mysql"
+	call:execute_tests "mssql"
+	::call:execute_tests "ora"
+	call:execute_tests "pgsql"
+) else (
+	call:execute_tests "%1"
+)
 
 goto:eof
 
@@ -83,6 +102,9 @@ goto:eof
 	if "%~1" == "mysql" mysql -u oc_autotest -powncloud -e "DROP DATABASE oc_autotest"
 	
 	if "%~1" == "pgsql" dropdb -h localhost -p 5432 -U oc_autotest -w oc_autotest
+
+	:: we assume a sqlexpress installation
+	if "%~1" == "mssql" sqlcmd -S localhost\sqlexpress -U oc_autotest -P owncloud -Q "IF EXISTS (SELECT name FROM sys.databases WHERE name=N'oc_autotest') DROP DATABASE [oc_autotest]"
 	
 	:: copy autoconfig
 	copy /y %BASEDIR%\tests\autoconfig-%~1.php %BASEDIR%\config\autoconfig.php
@@ -96,9 +118,8 @@ goto:eof
 	rmdir /s /q coverage-html-%~1
 	md coverage-html-%~1
 	php -f enable_all.php
-	::phpunit --log-junit autotest-results-%~1.xml --coverage-clover autotest-clover-%~1.xml --coverage-html coverage-html-%~1
-	::phpunit --bootstrap bootstrap.php --configuration phpunit.xml
-	php win32-phpunit.php --bootstrap bootstrap.php --configuration phpunit.xml --log-junit autotest-results-%~1.xml --coverage-clover autotest-clover-%~1.xml --coverage-html coverage-html-%~1
+
+	php win32-phpunit.php --bootstrap bootstrap.php --configuration phpunit-autotest.xml --log-junit autotest-results-%~1.xml --coverage-clover autotest-clover-%~1.xml --coverage-html coverage-html-%~1
 	echo "Done with testing %~1 ..."
 	cd %BASEDIR%
 goto:eof
@@ -114,4 +135,10 @@ goto:eof
 ::  - to enable dropdb I decided to add following line to pg_hba.conf (this is not the safest way but I don't care for the testing machine):
 :: local	all	all	trust
 ::
+:: NOTES on mssql:
+::  we assume the usage of a local installed sqlexpress
+::  create a user 'oc_autotest' with password 'owncloud' and assign the server role 'dbcreator'
+::  make sure the sqlserver is configured to allow sql authentication
+::
+
 
diff --git a/core/js/setup.js b/core/js/setup.js
index 2656cac2f4..76812b2997 100644
--- a/core/js/setup.js
+++ b/core/js/setup.js
@@ -5,6 +5,7 @@ $(document).ready(function() {
 		mysql:!!$('#hasMySQL').val(),
 		postgresql:!!$('#hasPostgreSQL').val(),
 		oracle:!!$('#hasOracle').val(),
+		mssql:!!$('#hasMSSQL').val()
 	};
 	
 	$('#selectDbType').buttonset();
@@ -41,6 +42,12 @@ $(document).ready(function() {
 		$('#dbhost').show(250);
 		$('#dbhostlabel').show(250);
 	});
+    
+	$('#mssql').click(function() {
+		$('#use_other_db').slideDown(250);
+		$('#dbhost').show(250);
+		$('#dbhostlabel').show(250);
+	});
 
 	$('input[checked]').trigger('click');
 
diff --git a/core/setup.php b/core/setup.php
index f16385466c..77eed5376d 100644
--- a/core/setup.php
+++ b/core/setup.php
@@ -16,6 +16,7 @@ $hasSQLite = class_exists('SQLite3');
 $hasMySQL = is_callable('mysql_connect');
 $hasPostgreSQL = is_callable('pg_connect');
 $hasOracle = is_callable('oci_connect');
+$hasMSSQL = is_callable('sqlsrv_connect');
 $datadir = OC_Config::getValue('datadirectory', OC::$SERVERROOT.'/data');
 
 // Protect data directory here, so we can test if the protection is working
@@ -26,6 +27,7 @@ $opts = array(
 	'hasMySQL' => $hasMySQL,
 	'hasPostgreSQL' => $hasPostgreSQL,
 	'hasOracle' => $hasOracle,
+	'hasMSSQL' => $hasMSSQL,
 	'directory' => $datadir,
 	'secureRNG' => OC_Util::secureRNG_available(),
 	'htaccessWorking' => OC_Util::ishtaccessworking(),
diff --git a/core/templates/installation.php b/core/templates/installation.php
index c48d2f764e..aca9648d0b 100644
--- a/core/templates/installation.php
+++ b/core/templates/installation.php
@@ -2,6 +2,7 @@
 <input type='hidden' id='hasSQLite' value='<?php echo $_['hasSQLite'] ?>'>
 <input type='hidden' id='hasPostgreSQL' value='<?php echo $_['hasPostgreSQL'] ?>'>
 <input type='hidden' id='hasOracle' value='<?php echo $_['hasOracle'] ?>'>
+<input type='hidden' id='hasMSSQL' value='<?php echo $_['hasMSSQL'] ?>'>
 <form action="index.php" method="post">
 <input type="hidden" name="install" value="true" />
 	<?php if(count($_['errors']) > 0): ?>
@@ -60,7 +61,7 @@
 	</fieldset>
 
 	<fieldset id='databaseField'>
-		<?php if($_['hasMySQL'] or $_['hasPostgreSQL'] or $_['hasOracle'])
+		<?php if($_['hasMySQL'] or $_['hasPostgreSQL'] or $_['hasOracle'] or $_['hasMSSQL'])
 			$hasOtherDB = true; else $hasOtherDB =false; //other than SQLite ?>
 		<legend><?php echo $l->t( 'Configure the database' ); ?></legend>
 		<div id="selectDbType">
@@ -78,7 +79,7 @@
 
 		<?php if($_['hasMySQL']): ?>
 		<input type='hidden' id='hasMySQL' value='true'/>
-		<?php if(!$_['hasSQLite'] and !$_['hasPostgreSQL'] and !$_['hasOracle']): ?>
+		<?php if(!$_['hasSQLite'] and !$_['hasPostgreSQL'] and !$_['hasOracle'] and !$_['hasMSSQL']): ?>
 		<p>MySQL <?php echo $l->t( 'will be used' ); ?>.</p>
 		<input type="hidden" id="dbtype" name="dbtype" value="mysql" />
 		<?php else: ?>
@@ -89,7 +90,7 @@
 		<?php endif; ?>
 
 		<?php if($_['hasPostgreSQL']): ?>
-		<?php if(!$_['hasSQLite'] and !$_['hasMySQL'] and !$_['hasOracle']): ?>
+		<?php if(!$_['hasSQLite'] and !$_['hasMySQL'] and !$_['hasOracle'] and !$_['hasMSSQL']): ?>
 		<p>PostgreSQL <?php echo $l->t( 'will be used' ); ?>.</p>
 		<input type="hidden" id="dbtype" name="dbtype" value="pgsql" />
 		<?php else: ?>
@@ -100,7 +101,7 @@
 		<?php endif; ?>
 
 		<?php if($_['hasOracle']): ?>
-		<?php if(!$_['hasSQLite'] and !$_['hasMySQL'] and !$_['hasPostgreSQL']): ?>
+		<?php if(!$_['hasSQLite'] and !$_['hasMySQL'] and !$_['hasPostgreSQL'] and !$_['hasMSSQL']): ?>
 		<p>Oracle <?php echo $l->t( 'will be used' ); ?>.</p>
 		<input type="hidden" id="dbtype" name="dbtype" value="oci" />
 		<?php else: ?>
@@ -109,6 +110,17 @@
 			<?php OC_Helper::init_radio('dbtype', 'oci', 'sqlite'); ?>/>
 		<?php endif; ?>
 		<?php endif; ?>
+        
+		<?php if($_['hasMSSQL']): ?>
+		<input type='hidden' id='hasMSSQL' value='true'/>
+		<?php if(!$_['hasSQLite'] and !$_['hasMySQL'] and !$_['hasPostgreSQL'] and !$_['hasOracle']): ?>
+		<p>MS SQL <?php echo $l->t( 'will be used' ); ?>.</p>
+		<input type="hidden" id="dbtype" name="dbtype" value="mssql" />
+		<?php else: ?>
+		<label class="mssql" for="mssql">MS SQL</label>
+		<input type="radio" name="dbtype" value='mssql' id="mssql" <?php OC_Helper::init_radio('dbtype', 'mssql', 'sqlite'); ?>/>
+		<?php endif; ?>
+		<?php endif; ?>        
 		</div>
 
 		<?php if($hasOtherDB): ?>
diff --git a/lib/db.php b/lib/db.php
index edbc2fe13e..fb2c027cdb 100644
--- a/lib/db.php
+++ b/lib/db.php
@@ -178,6 +178,13 @@ class OC_DB {
 							$dsn = 'oci:dbname=//' . $host . '/' . $name;
 					}
 					break;
+                case 'mssql':
+					if ($port) {
+							$dsn='sqlsrv:Server='.$host.','.$port.';Database='.$name;
+					} else {
+							$dsn='sqlsrv:Server='.$host.';Database='.$name;
+					}
+					break;                    
 				default:
 					return false;
 			}
@@ -278,6 +285,15 @@ class OC_DB {
 						$dsn['database'] = $user;
 					}
 					break;
+				case 'mssql':
+					$dsn = array(
+						'phptype' => 'sqlsrv',
+						'username' => $user,
+						'password' => $pass,
+						'hostspec' => $host,
+						'database' => $name
+					);                    
+					break;
 				default:
 					return false;
 			}
@@ -389,6 +405,13 @@ class OC_DB {
 			$query = self::prepare('SELECT lastval() AS id');
 			$row = $query->execute()->fetchRow();
 			return $row['id'];
+		}
+		if( $type == 'mssql' ) {
+			if($table !== null) {
+				$prefix = OC_Config::getValue( "dbtableprefix", "oc_" );
+				$table = str_replace( '*PREFIX*', $prefix, $table );
+			}
+			return self::$connection->lastInsertId($table);
 		}else{
 			if($table !== null) {
 				$prefix = OC_Config::getValue( "dbtableprefix", "oc_" );
@@ -631,7 +654,7 @@ class OC_DB {
 			} else {
 				return true;
 			}
-		} elseif( $type == 'pgsql' || $type == 'oci' || $type == 'mysql') {
+		} elseif( $type == 'pgsql' || $type == 'oci' || $type == 'mysql' || $type == 'mssql') {
 			$query = 'INSERT INTO `' .$table . '` ('
 				. implode(',', array_keys($input)) . ') SELECT \''
 				. implode('\',\'', array_values($input)) . '\' FROM ' . $table . ' WHERE ';
@@ -691,7 +714,15 @@ class OC_DB {
 		}elseif( $type == 'oci'  ) {
 			$query = str_replace( '`', '"', $query );
 			$query = str_ireplace( 'NOW()', 'CURRENT_TIMESTAMP', $query );
-		}
+		}elseif( $type == 'mssql' ) {
+			$query = preg_replace( "/\`(.*?)`/", "[$1]", $query );
+			$query = str_replace( 'NOW()', 'CURRENT_TIMESTAMP', $query );
+			$query = str_replace( 'now()', 'CURRENT_TIMESTAMP', $query );
+			$query = str_replace( 'LENGTH(', 'LEN(', $query );
+			$query = str_replace( 'SUBSTR(', 'SUBSTRING(', $query );
+            
+            $query = self::fixLimitClauseForMSSQL($query);
+        }
 
 		// replace table name prefix
 		$query = str_replace( '*PREFIX*', $prefix, $query );
@@ -699,6 +730,60 @@ class OC_DB {
 		return $query;
 	}
 
+    private static function fixLimitClauseForMSSQL($query) {
+        $limitLocation = stripos ($query, "LIMIT");
+        
+        if ( $limitLocation === false ) {
+            return $query;
+        } 
+        
+        // total == 0 means all results - not zero results
+        //
+        // First number is either total or offset, locate it by first space
+        //
+        $offset = substr ($query, $limitLocation + 5);
+        $offset = substr ($offset, 0, stripos ($offset, ' '));
+        $offset = trim ($offset);
+
+        // check for another parameter
+        if (stripos ($offset, ',') === false) {
+            // no more parameters
+            $offset = 0;
+            $total = intval ($offset);
+        } else {
+            // found another parameter
+            $offset = intval ($offset);
+
+            $total = substr ($query, $limitLocation + 5);
+            $total = substr ($total, stripos ($total, ','));
+
+            $total = substr ($total, 0, stripos ($total, ' '));
+            $total = intval ($total);
+        }
+
+        $query = trim (substr ($query, 0, $limitLocation));
+
+        if ($offset == 0 && $total !== 0) {
+            if (strpos($query, "SELECT") === false) {
+                $query = "TOP {$total} " . $query;
+            } else {
+                $query = preg_replace('/SELECT(\s*DISTINCT)?/Dsi', 'SELECT$1 TOP '.$total, $query);
+            }
+        } else if ($offset > 0) {
+            $query = preg_replace('/SELECT(\s*DISTINCT)?/Dsi', 'SELECT$1 TOP(10000000) ', $query);
+            $query = 'SELECT *
+                    FROM (SELECT sub2.*, ROW_NUMBER() OVER(ORDER BY sub2.line2) AS line3
+                    FROM (SELECT 1 AS line2, sub1.* FROM (' . $query . ') AS sub1) as sub2) AS sub3';
+
+            if ($total > 0) {
+                $query .= ' WHERE line3 BETWEEN ' . ($offset + 1) . ' AND ' . ($offset + $total);
+            } else {
+                $query .= ' WHERE line3 > ' . $offset;
+            }
+        }
+        return $query;
+    }
+    
 	/**
 	 * @brief drop a table
 	 * @param string $tableName the table to drop
@@ -850,19 +935,119 @@ class PDOStatementWrapper{
 	 * make execute return the result instead of a bool
 	 */
 	public function execute($input=array()) {
-		$this->lastArguments=$input;
-		if(count($input)>0) {
+		$this->lastArguments = $input;
+		if (count($input) > 0) {
+
+			if (!isset($type)) {
+				$type = OC_Config::getValue( "dbtype", "sqlite" );
+			}
+
+			if ($type == 'mssql') {
+				$input = $this->tryFixSubstringLastArgumentDataForMSSQL($input);
+			}
+
 			$result=$this->statement->execute($input);
-		}else{
+		} else {
 			$result=$this->statement->execute();
 		}
-		if($result) {
+		
+		if ($result) {
 			return $this;
-		}else{
+		} else {
 			return false;
 		}
 	}
 
+	private function tryFixSubstringLastArgumentDataForMSSQL($input) {
+		$query = $this->statement->queryString;
+		$pos = stripos ($query, 'SUBSTRING');
+
+		if ( $pos === false) {
+			return;
+		}
+
+		try {
+			$newQuery = '';
+
+			$cArg = 0;
+
+			$inSubstring = false;
+
+			// Create new query
+			for ($i = 0; $i < strlen ($query); $i++) {
+				if ($inSubstring == false) {
+					// Defines when we should start inserting values
+					if (substr ($query, $i, 9) == 'SUBSTRING') {
+						$inSubstring = true;
+					}
+				} else {
+					// Defines when we should stop inserting values
+					if (substr ($query, $i, 1) == ')') {
+						$inSubstring = false;
+					}
+				}
+
+				if (substr ($query, $i, 1) == '?') {
+					// We found a question mark
+					if ($inSubstring) {
+						$newQuery .= $input[$cArg];
+
+						//
+						// Remove from input array
+						//
+						array_splice ($input, $cArg, 1);
+					} else {
+						$newQuery .= substr ($query, $i, 1);
+						$cArg++;
+					}
+				} else {
+					$newQuery .= substr ($query, $i, 1);
+				}
+			}
+
+			// The global data we need
+			$name = OC_Config::getValue( "dbname", "owncloud" );
+			$host = OC_Config::getValue( "dbhost", "" );
+			$user = OC_Config::getValue( "dbuser", "" );
+			$pass = OC_Config::getValue( "dbpassword", "" );
+			if (strpos($host,':')) {
+				list($host, $port) = explode(':', $host, 2);
+			} else {
+				$port = false;
+			}
+			$opts = array();
+
+			if ($port) {
+				$dsn = 'sqlsrv:Server='.$host.','.$port.';Database='.$name;
+			} else {
+				$dsn = 'sqlsrv:Server='.$host.';Database='.$name;
+			}
+
+			$PDO = new PDO($dsn, $user, $pass, $opts);
+			$PDO->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
+			$PDO->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+			$this->statement = $PDO->prepare($newQuery);
+
+			$this->lastArguments = $input;
+
+			return $input;
+		} catch (PDOException $e){
+			$entry = 'PDO DB Error: "'.$e->getMessage().'"<br />';
+			$entry .= 'Offending command was: '.$this->statement->queryString .'<br />';
+			$entry .= 'Input parameters: ' .print_r($input, true).'<br />';
+			$entry .= 'Stack trace: ' .$e->getTraceAsString().'<br />';
+			OC_Log::write('core', $entry, OC_Log::FATAL);
+			OC_User::setUserId(null);
+
+			// send http status 503
+			header('HTTP/1.1 503 Service Temporarily Unavailable');
+			header('Status: 503 Service Temporarily Unavailable');
+			OC_Template::printErrorPage('Failed to connect to database');
+			die ($entry);
+		}
+	}
+    
 	/**
 	 * provide numRows
 	 */
diff --git a/lib/files/cache/cache.php b/lib/files/cache/cache.php
index 3652dc7cf2..01e6e78826 100644
--- a/lib/files/cache/cache.php
+++ b/lib/files/cache/cache.php
@@ -500,8 +500,8 @@ class Cache {
 	public function getIncomplete() {
 		$query = \OC_DB::prepare('SELECT `path` FROM `*PREFIX*filecache`'
 			. ' WHERE `storage` = ? AND `size` = -1 ORDER BY `fileid` DESC LIMIT 1');
-		$query->execute(array($this->numericId));
-		if ($row = $query->fetchRow()) {
+		$result = $query->execute(array($this->numericId));
+		if ($row = $result->fetchRow()) {
 			return $row['path'];
 		} else {
 			return false;
diff --git a/lib/setup.php b/lib/setup.php
index 19e4a82b51..fd5f3cd5be 100644
--- a/lib/setup.php
+++ b/lib/setup.php
@@ -40,11 +40,13 @@ class OC_Setup {
 			$error[] = $l->t('Specify a data folder.');
 		}
 
-		if($dbtype=='mysql' or $dbtype == 'pgsql' or $dbtype == 'oci') { //mysql and postgresql needs more config options
-			if($dbtype=='mysql')
+		if($dbtype == 'mysql' or $dbtype == 'pgsql' or $dbtype == 'oci' or $dbtype == 'mssql') { //mysql and postgresql needs more config options
+			if($dbtype == 'mysql')
 				$dbprettyname = 'MySQL';
-			else if($dbtype=='pgsql')
+			else if($dbtype == 'pgsql')
 				$dbprettyname = 'PostgreSQL';
+			else if ($dbtype == 'mssql')
+				$dbprettyname = 'MS SQL Server';
 			else
 				$dbprettyname = 'Oracle';
 
@@ -152,6 +154,29 @@ class OC_Setup {
 					return $error;
 				}
 			}
+			elseif ($dbtype == 'mssql') {
+				$dbuser = $options['dbuser'];
+				$dbpass = $options['dbpass'];
+				$dbname = $options['dbname'];
+				$dbhost = $options['dbhost'];
+				$dbtableprefix = isset($options['dbtableprefix']) ? $options['dbtableprefix'] : 'oc_';
+
+				OC_Config::setValue('dbname', $dbname);
+				OC_Config::setValue('dbhost', $dbhost);
+				OC_Config::setValue('dbuser', $dbuser);
+				OC_Config::setValue('dbpassword', $dbpass);
+				OC_Config::setValue('dbtableprefix', $dbtableprefix);
+
+				try {
+					self::setupMSSQLDatabase($dbhost, $dbuser, $dbpass, $dbname, $dbtableprefix);
+				} catch (Exception $e) {
+					$error[] = array(
+						'error' => 'MS SQL username and/or password not valid',
+						'hint' => 'You need to enter either an existing account or the administrator.'
+					);
+					return $error;
+				}
+			}
 			else {
 				//delete the old sqlite database first, might cause infinte loops otherwise
 				if(file_exists("$datadir/owncloud.db")) {
@@ -256,11 +281,12 @@ class OC_Setup {
 		if(!$result) {
 			$entry = $l->t('DB Error: "%s"', array(mysql_error($connection))) . '<br />';
 			$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-			echo($entry);
+			\OC_Log::write('setup.mssql', $entry, \OC_Log::WARN);
 		}
 		$query="GRANT ALL PRIVILEGES ON  `$name` . * TO  '$user'";
-		//this query will fail if there aren't the right permissons, ignore the error
-		$result = mysql_query($query, $connection);
+
+		//this query will fail if there aren't the right permissions, ignore the error
+		mysql_query($query, $connection);
 	}
 
 	private static function createDBUser($name, $password, $connection) {
@@ -359,7 +385,7 @@ class OC_Setup {
 		if(!$result) {
 			$entry = $l->t('DB Error: "%s"', array(pg_last_error($connection))) . '<br />';
 			$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-			echo($entry);
+			\OC_Log::write('setup.pg', $entry, \OC_Log::WARN);
 		}
 		if(! pg_fetch_row($result)) {
 			//The database does not exists... let's create it
@@ -368,11 +394,11 @@ class OC_Setup {
 			if(!$result) {
 				$entry = $l->t('DB Error: "%s"', array(pg_last_error($connection))) . '<br />';
 				$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-				echo($entry);
+				\OC_Log::write('setup.pg', $entry, \OC_Log::WARN);
 			}
 			else {
 				$query = "REVOKE ALL PRIVILEGES ON DATABASE \"$e_name\" FROM PUBLIC";
-				$result = pg_query($connection, $query);
+				pg_query($connection, $query);
 			}
 		}
 	}
@@ -386,7 +412,7 @@ class OC_Setup {
 		if(!$result) {
 			$entry = $l->t('DB Error: "%s"', array(pg_last_error($connection))) . '<br />';
 			$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-			echo($entry);
+			\OC_Log::write('setup.pg', $entry, \OC_Log::WARN);
 		}
 
 		if(! pg_fetch_row($result)) {
@@ -396,7 +422,7 @@ class OC_Setup {
 			if(!$result) {
 				$entry = $l->t('DB Error: "%s"', array(pg_last_error($connection))) . '<br />';
 				$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-				echo($entry);
+				\OC_Log::write('setup.pg', $entry, \OC_Log::WARN);
 			}
 		}
 		else { // change password of the existing role
@@ -405,7 +431,7 @@ class OC_Setup {
 			if(!$result) {
 				$entry = $l->t('DB Error: "%s"', array(pg_last_error($connection))) . '<br />';
 				$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-				echo($entry);
+				\OC_Log::write('setup.pg', $entry, \OC_Log::WARN);
 			}
 		}
 	}
@@ -434,7 +460,7 @@ class OC_Setup {
 		if (!$stmt) {
 			$entry = $l->t('DB Error: "%s"', array(oci_last_error($connection))) . '<br />';
 			$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-			echo($entry);
+			\OC_Log::write('setup.oci', $entry, \OC_Log::WARN);
 		}
 		$result = oci_execute($stmt);
 		if($result) {
@@ -498,9 +524,9 @@ class OC_Setup {
 		$un = $dbtableprefix.'users';
 		oci_bind_by_name($stmt, ':un', $un);
 		if (!$stmt) {
-			$entry = $l->t('DB Error: "%s"', array(oci_last_error($connection))) . '<br />';
+			$entry = $l->t('DB Error: "%s"', array(oci_error($connection))) . '<br />';
 			$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-			echo($entry);
+			\OC_Log::write('setup.oci', $entry, \OC_Log::WARN);
 		}
 		$result = oci_execute($stmt);
 
@@ -526,14 +552,14 @@ class OC_Setup {
 		if (!$stmt) {
 			$entry = $l->t('DB Error: "%s"', array(oci_error($connection))) . '<br />';
 			$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-			echo($entry);
+			\OC_Log::write('setup.oci', $entry, \OC_Log::WARN);
 		}
 		oci_bind_by_name($stmt, ':un', $name);
 		$result = oci_execute($stmt);
 		if(!$result) {
 			$entry = $l->t('DB Error: "%s"', array(oci_error($connection))) . '<br />';
 			$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-			echo($entry);
+			\OC_Log::write('setup.oci', $entry, \OC_Log::WARN);
 		}
 
 		if(! oci_fetch_row($stmt)) {
@@ -544,7 +570,7 @@ class OC_Setup {
 			if (!$stmt) {
 				$entry = $l->t('DB Error: "%s"', array(oci_error($connection))) . '<br />';
 				$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-				echo($entry);
+				\OC_Log::write('setup.oci', $entry, \OC_Log::WARN);
 			}
 			//oci_bind_by_name($stmt, ':un', $name);
 			$result = oci_execute($stmt);
@@ -552,7 +578,7 @@ class OC_Setup {
 				$entry = $l->t('DB Error: "%s"', array(oci_error($connection))) . '<br />';
 				$entry .= $l->t('Offending command was: "%s", name: %s, password: %s',
 					array($query, $name, $password)) . '<br />';
-				echo($entry);
+				\OC_Log::write('setup.oci', $entry, \OC_Log::WARN);
 			}
 		} else { // change password of the existing role
 			$query = "ALTER USER :un IDENTIFIED BY :pw";
@@ -560,7 +586,7 @@ class OC_Setup {
 			if (!$stmt) {
 				$entry = $l->t('DB Error: "%s"', array(oci_error($connection))) . '<br />';
 				$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-				echo($entry);
+				\OC_Log::write('setup.oci', $entry, \OC_Log::WARN);
 			}
 			oci_bind_by_name($stmt, ':un', $name);
 			oci_bind_by_name($stmt, ':pw', $password);
@@ -568,26 +594,200 @@ class OC_Setup {
 			if(!$result) {
 				$entry = $l->t('DB Error: "%s"', array(oci_error($connection))) . '<br />';
 				$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-				echo($entry);
+				\OC_Log::write('setup.oci', $entry, \OC_Log::WARN);
 			}
 		}
-		// grant neccessary roles
+		// grant necessary roles
 		$query = 'GRANT CREATE SESSION, CREATE TABLE, CREATE SEQUENCE, CREATE TRIGGER, UNLIMITED TABLESPACE TO '.$name;
 		$stmt = oci_parse($connection, $query);
 		if (!$stmt) {
 			$entry = $l->t('DB Error: "%s"', array(oci_error($connection))) . '<br />';
 			$entry .= $l->t('Offending command was: "%s"', array($query)) . '<br />';
-			echo($entry);
+			\OC_Log::write('setup.oci', $entry, \OC_Log::WARN);
 		}
 		$result = oci_execute($stmt);
 		if(!$result) {
 			$entry = $l->t('DB Error: "%s"', array(oci_error($connection))) . '<br />';
 			$entry .= $l->t('Offending command was: "%s", name: %s, password: %s',
 				array($query, $name, $password)) . '<br />';
-			echo($entry);
+			\OC_Log::write('setup.oci', $entry, \OC_Log::WARN);
 		}
 	}
 
+	private static function setupMSSQLDatabase($dbhost, $dbuser, $dbpass, $dbname, $dbtableprefix) {
+		$l = self::getTrans();
+
+		//check if the database user has admin right
+		$masterConnectionInfo = array( "Database" => "master", "UID" => $dbuser, "PWD" => $dbpass);
+
+		$masterConnection = @sqlsrv_connect($dbhost, $masterConnectionInfo);
+		if(!$masterConnection) {
+			$entry = null;
+			if( ($errors = sqlsrv_errors() ) != null) {
+				$entry='DB Error: "'.print_r(sqlsrv_errors()).'"<br />';
+			} else {
+				$entry = '';
+			}
+			throw new Exception($l->t('MS SQL username and/or password not valid: $s', array($entry)));
+		}
+
+		OC_Config::setValue('dbuser', $dbuser);
+		OC_Config::setValue('dbpassword', $dbpass);
+
+		self::mssql_createDBLogin($dbuser, $dbpass, $masterConnection);
+
+		self::mssql_createDatabase($dbname, $masterConnection);
+
+		self::mssql_createDBUser($dbuser, $dbname, $masterConnection);
+
+		sqlsrv_close($masterConnection);
+
+		self::mssql_createDatabaseStructure($dbhost, $dbname, $dbuser, $dbpass, $dbtableprefix);
+	}
+
+	private static function mssql_createDBLogin($name, $password, $connection) {
+		$query = "SELECT * FROM master.sys.server_principals WHERE name = '".$name."';";
+		$result = sqlsrv_query($connection, $query);
+		if ($result === false) {
+			if ( ($errors = sqlsrv_errors() ) != null) {
+				$entry='DB Error: "'.print_r(sqlsrv_errors()).'"<br />';
+			} else {
+				$entry = '';
+			}
+			$entry.='Offending command was: '.$query.'<br />';
+			\OC_Log::write('setup.mssql', $entry, \OC_Log::WARN);
+		} else {
+			$row = sqlsrv_fetch_array($result);
+
+			if ($row === false) {
+				if ( ($errors = sqlsrv_errors() ) != null) {
+					$entry='DB Error: "'.print_r(sqlsrv_errors()).'"<br />';
+				} else {
+					$entry = '';
+				}
+				$entry.='Offending command was: '.$query.'<br />';
+				\OC_Log::write('setup.mssql', $entry, \OC_Log::WARN);
+			} else {
+				if ($row == null) {
+					$query = "CREATE LOGIN [".$name."] WITH PASSWORD = '".$password."';";
+					$result = sqlsrv_query($connection, $query);
+					if (!$result or $result === false) {
+						if ( ($errors = sqlsrv_errors() ) != null) {
+							$entry='DB Error: "'.print_r(sqlsrv_errors()).'"<br />';
+						} else {
+							$entry = '';
+						}
+						$entry.='Offending command was: '.$query.'<br />';
+						\OC_Log::write('setup.mssql', $entry, \OC_Log::WARN);
+					}
+				}
+			}
+		}
+	}
+
+	private static function mssql_createDBUser($name, $dbname, $connection) {
+		$query = "SELECT * FROM [".$dbname."].sys.database_principals WHERE name = '".$name."';";
+		$result = sqlsrv_query($connection, $query);
+		if ($result === false) {
+			if ( ($errors = sqlsrv_errors() ) != null) {
+				$entry='DB Error: "'.print_r(sqlsrv_errors()).'"<br />';
+			} else {
+				$entry = '';
+			}
+			$entry.='Offending command was: '.$query.'<br />';
+			\OC_Log::write('setup.mssql', $entry, \OC_Log::WARN);
+		} else {
+			$row = sqlsrv_fetch_array($result);
+
+			if ($row === false) {
+				if ( ($errors = sqlsrv_errors() ) != null) {
+					$entry='DB Error: "'.print_r(sqlsrv_errors()).'"<br />';
+				} else {
+					$entry = '';
+				}
+				$entry.='Offending command was: '.$query.'<br />';
+				\OC_Log::write('setup.mssql', $entry, \OC_Log::WARN);
+			} else {
+				if ($row == null) {
+					$query = "USE [".$dbname."]; CREATE USER [".$name."] FOR LOGIN [".$name."];";
+					$result = sqlsrv_query($connection, $query);
+					if (!$result || $result === false) {
+						if ( ($errors = sqlsrv_errors() ) != null) {
+							$entry = 'DB Error: "'.print_r(sqlsrv_errors()).'"<br />';
+						} else {
+							$entry = '';
+						}
+						$entry.='Offending command was: '.$query.'<br />';
+						\OC_Log::write('setup.mssql', $entry, \OC_Log::WARN);
+					}
+				}
+
+				$query = "USE [".$dbname."]; EXEC sp_addrolemember 'db_owner', '".$name."';";
+				$result = sqlsrv_query($connection, $query);
+				if (!$result || $result === false) {
+					if ( ($errors = sqlsrv_errors() ) != null) {
+						$entry='DB Error: "'.print_r(sqlsrv_errors()).'"<br />';
+					} else {
+						$entry = '';
+					}
+					$entry.='Offending command was: '.$query.'<br />';
+					\OC_Log::write('setup.mssql', $entry, \OC_Log::WARN);
+				}
+			}
+		}
+	}
+
+	private static function mssql_createDatabase($dbname, $connection) {
+		$query = "CREATE DATABASE [".$dbname."];";
+		$result = sqlsrv_query($connection, $query);
+		if (!$result || $result === false) {
+			if ( ($errors = sqlsrv_errors() ) != null) {
+				$entry='DB Error: "'.print_r(sqlsrv_errors()).'"<br />';
+			} else {
+				$entry = '';
+			}
+			$entry.='Offending command was: '.$query.'<br />';
+			\OC_Log::write('setup.mssql', $entry, \OC_Log::WARN);
+		}
+	}
+
+	private static function mssql_createDatabaseStructure($dbhost, $dbname, $dbuser, $dbpass, $dbtableprefix) {
+		$connectionInfo = array( "Database" => $dbname, "UID" => $dbuser, "PWD" => $dbpass);
+
+		$connection = @sqlsrv_connect($dbhost, $connectionInfo);
+
+		//fill the database if needed
+		$query = "SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = '{$dbname}' AND TABLE_NAME = '{$dbtableprefix}users'";
+		$result = sqlsrv_query($connection, $query);
+		if ($result === false) {
+			if ( ($errors = sqlsrv_errors() ) != null) {
+				$entry='DB Error: "'.print_r(sqlsrv_errors()).'"<br />';
+			} else {
+				$entry = '';
+			}
+			$entry.='Offending command was: '.$query.'<br />';
+			\OC_Log::write('setup.mssql', $entry, \OC_Log::WARN);
+		} else {
+			$row = sqlsrv_fetch_array($result);
+
+			if ($row === false) {
+				if ( ($errors = sqlsrv_errors() ) != null) {
+					$entry='DB Error: "'.print_r(sqlsrv_errors()).'"<br />';
+				} else {
+					$entry = '';
+				}
+				$entry.='Offending command was: '.$query.'<br />';
+				\OC_Log::write('setup.mssql', $entry, \OC_Log::WARN);
+			} else {
+				if ($row == null) {
+					OC_DB::createDbFromStructure('db_structure.xml');
+				}
+			}
+		}
+
+		sqlsrv_close($connection);
+	}
+
 	/**
 	 * create .htaccess files for apache hosts
 	 */
diff --git a/tests/lib/dbschema.php b/tests/lib/dbschema.php
index fb60ce7dbb..e20a04ef7f 100644
--- a/tests/lib/dbschema.php
+++ b/tests/lib/dbschema.php
@@ -91,9 +91,15 @@ class Test_DBSchema extends PHPUnit_Framework_TestCase {
 				break;
 			case 'pgsql':
 				$sql = "SELECT tablename AS table_name, schemaname AS schema_name "
-				. "FROM pg_tables WHERE schemaname NOT LIKE 'pg_%' "
-				.  "AND schemaname != 'information_schema' "
-				.  "AND tablename = '".$table."'";
+					. "FROM pg_tables WHERE schemaname NOT LIKE 'pg_%' "
+					.  "AND schemaname != 'information_schema' "
+					.  "AND tablename = '".$table."'";
+				$query = OC_DB::prepare($sql);
+				$result = $query->execute(array());
+				$exists = $result && $result->fetchOne();
+				break;
+			case 'mssql':
+				$sql = "SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = '{$table}'";
 				$query = OC_DB::prepare($sql);
 				$result = $query->execute(array());
 				$exists = $result && $result->fetchOne();