Most organizations operating Exchange Server have it running 24/7. Yet expecting Exchange Server to run perfectly all the time is unrealistic; without proper management and without securing its components, you’re going to encounter problems. Particularly, security doesn’t end at the edges of your company’s office building or data center. Depending on the scenario, you may need to arrange protocols and safety measures for communications with parties over the public network—communications that, by default, are open and readable to others.
Since Exchange 2007, Exchange Server has been positioned by Microsoft as “secure by default.” ...