Hallo,
insert into function translate_general($query) in file \wp-content\mu-plugins\wp-db-abstraction\translations\sqlsrv\translations.php this code:
// SHOW FULL COLUMNS
if ( stripos($query, 'SHOW FULL COLUMNS FROM ') === 0 ) {
$end_pos = strlen($query);
$param = substr($query, 23, $end_pos - 23);
$param = "'". trim($param, "'") . "'";
$query = 'SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = ' . $param;
}
After WP can be update to last version (4.2.4) and work on IIS and MS SQL on Windows. I love It ??