[exim] forward mails to exchange server

Hi

I have the ip address of exchange server and need to forward emails from
example.com to 210.11.11.11
I have specified this in the config file. will this work.

special:
     driver = manualroute
     transport = remote_smtp
     route_list = example.com 210.11.11.11

Also do i need to recreate user accounts that are present in exchange server
and do I have to mention the ipaddress of exchange server in MX record.
How do I test out this configuration.

Please can anyone help because I need to do this ASAP.

Thanks,
kailash