1) I am not sure but you might be able to set these options:
security = server
password server = pdc
Not sure if that works for AD.
2) You need to set vhosts:
NameVirtualHost 192.168.1.3:80
<VirtualHost 192.168.1.3:80>
ServerAdmin
jo@hotmail.com
DocumentRoot /var/www/html/server1
ServerName server1.domain.com
ErrorLog logs/server1.domain.com-error_log
CustomLog logs/server1.domain.com-access_log common
</VirtualHost>
<VirtualHost 192.168.1.3:80>
ServerAdmin
jo@hotmail.com
DocumentRoot /var/www/html/server2
ServerName server2.domain.com
ErrorLog logs/server2.domain.com-error_log
CustomLog logs/server2.domain.com-access_log common
</VirtualHost>