MSSQL - Adaptive Server is unavailable or does not exist

Hi,

I'm trying to connect with sql server but i'm having problems, i can't connect. I don't what this erro means? How can i solve that?

I have this error :

SQLSTATE[HY000] Unable to connect: Adaptive Server is unavailable or does not exist (severity 9)

my .env file:

DB_CONNECTION=sqlsrv
DB_HOST=SQL SERVER NAME
DB_PORT=3306
DB_DATABASE= DB_NAME
DB_USERNAME= DB_USER
DB_PASSWORD= DB_PASSWORD

database connection:

        'sqlsrv' => [
            'driver' => 'sqlsrv',
            'host' => env('DB_HOST', 'localhost'),
            'port' => env('DB_PORT', '3306'),
            'database' => env('DB_DATABASE', 'forge'),
            'username' => env('DB_USERNAME', 'forge'),
            'password' => env('DB_PASSWORD', ''),
            'charset' => 'utf8',
            'prefix' => '',
        ],

Thank's