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Chapter 1: Getting to Know Exchange Server 2007
Choosing a licensing option can be tricky. It comes down to one of determin-
ing how your users interact with Exchange Server. If the majority of your users
rely on a single machine that sits at your office, a per-device license makes
sense. However, if your users rely on several machines as they go from one
place to another, relying on a per-user license may be a better idea. Choosing
the wrong license can cost your organization considerable money, even if you
make all the right decisions when it comes to Exchange Server 2007 Edition
and CAL Edition.
Considering Microsoft Exchange
Hosted Services
Just about everyone in business relies on e-mail today. It’s hard to find a busi-
ness that doesn’t make at least part of its sales from e-mail. In addition, e-mail
provides a means to communicate with both customers and employees. Even
factory jobs often require the use of e-mail to ensure good communication
between employees and support staff. Unfortunately, your e-mail is under
attack from a number of sources, including:
 Viruses, worms, and other malware
 DDoS
 Phishing
 Spam
 Government regulations
 Legal actions
Microsoft Exchange Hosted Services help you fight these communication prob-
lems without making a large investment in Microsoft Exchange Server — you
simply rent the services you need from Microsoft. Using Microsoft Exchange
Hosted Services isn’t the same as obtaining a copy of Microsoft Exchange
Server — you don’t obtain e-mail, calendaring, and other common features.
However, you could use Microsoft Exchange Hosted Services to augment your
existing e-mail product without incurring a huge additional cost. The following
sections describe Microsoft Exchange Hosted Services in more detail.