[RCU] Roundcube vacation setup with exim virtual users

Hello,

I have installed the roundcube vacation message plugin https://sourceforge.net/projects/rcubevacation/

I have installed it on our server but don't know to configure it. We are on Freebsd, with exim, dovecot, and maildir. Our users are virtual users and do not have server access. Can anyone help me how I set this up with exim? From what I understand the roundcube vacation plugin requires a .forward file in the users home dir, however because our users are virtual they don't have their own home dir. Anyone know how I can set this up?

Thanks in advance, any advice is GREATLY appreciated.

Kristin