Confused about SDP Exchange integration

So it appears SDP does not support normal Exchange integration like our last help desk product did. It only supports POP or IMAP. That doesn't like like too big of an issue (for us) as we run our own Exchange environment and I think we can secure it well enough.

I am confused about the mail fetching though, SDP says "create a separate mail account and alias it to this mail ID".

We have one helpdesk mail ( helpdesk@xxxx.org) and want the users' mail to create a ticket (request) if they mail to helpdesk@xxxx.org. And have that request keyed to that AD user of course.

We also don't want Exchange or SDP to delete the mails off Exchange.

How to do this? Does the SDP POP fetching delete the mails off Exchange or isn't there a way to leave them?

Thanks! We have the paid SDP product with asset mgmt so I'll call the support line if necessary as well.