Iphone

Question: We have someone from outside our organization that setup our internal network including our file server and Exchange 2003. I think they might be reading our emails and I want to know how they do it. I too have Administrator rights but I have no idea how to even go about reading everyone's email without actually logging in as that person and opening their Outlook. Is there a way for this person to connect to our server and read our emails?

Iphone

It was how access to Exchange worked with Exchange 5.5.
With that version you used to have a specific account for the Exchange services and that account could had access to everything. That changed in Exchange 2000 as there were new accounts as part of the domain. However many people liked having that kind of access from a specific account (even though it is not required for day to day admin).

This kb article explains how to set up service account access: How to assign service account access to all mailboxes in Exchange Server 2003

If the user is abusing the permissions available to them then that needs to be raised with management. If I did that sort of thing with any of my customers I would expect to lose the contract as that is a breach of trust.