location /Microsoft-Server-ActiveSync
{
    client_max_body_size 30M; # set maximum upload size for mail attachments

    include fastcgi_params;
    fastcgi_index index.php;
    fastcgi_pass unix:/run/php5-kolab-syncroton.sock;
    fastcgi_param SCRIPT_FILENAME /usr/share/kolab-syncroton/index.php;
    fastcgi_read_timeout 120;
}