Along with the slew of desktop apps, you also get access to Microsoft Outlook Web Access (OWA), a sleek and modern web adaptation of the Outlook email client. It offers a familiar layout for calendars, contacts, and tasks, and a new "focused inbox"—all available in your browser. What Microsoft means by a "focused inbox" is that, rather than just being a dumping ground for all incoming email, it defaults to a dynamic view that's constantly being updated. This tech is based on a machine learning (ML) algorithm that attempts to figure out which email is most important to you; everything else goes to the regular inbox. As you sort emails between the focused inbox and the regular inbox, the algorithm gradually gets better, helping you to concentrate on email that matters most. You'll also be able to use mentions. When creating a new email, if you prepend someone's name with the @ sign, then it will automatically Cc that individual. You can also apply a filter that will show you emails in which you were directly mentioned.
You can also purchase Secure Sockets Layer certificates (starting at $69.99 per year), the software that's represented by a green padlock in your web browser when you visit, say, a financial institution's website. If you plan to sell products via your website, consider an SSL certificate an essential purchase, as it safeguards the data exchange between a customer and your servers.