(2) You are not following the instructions at http://www.tonymarston.net/php-mysql/sqlsrv.html#config.inc which states that the server name should be set to "(local)" as in the following:

$servers[1]['dbengine']       = 'sqlsrv';
$servers[1]['serverName']     = '(local)';
$servers[1]['connectionInfo'] = array('CharacterSet' => 'UTF-8',
                                      'ReturnDatesAsStrings' => true);
$servers[1]['SQLSRV_schema']  = 'dbo';

Note: when you are using the $servers array you do not need to use the $GLOBALS array. Use one or the other, but not both.

$servers[1]['serverName']     = '(local)';