[Exim] using Maildir

Hi

I am quite new to exim, however I have set exim up and it works fine
delivering mail to /var/mail/users , however I want to send mail to the
users Maildir as I am using courier-imap for web-based email. I know it
can be done but am not sure of which files need to be added under the
conf.d configuration for exim 4

Regards
Shaun