Microsoft Exchange is a business-class email and calendar that runs exclusively on Windows Server operating systems.
Microsoft Exchange is Microsoft’s email server solution. Company’s Incoming, outgoing, saved, and draft emails, calendars–everything is done through Microsoft Exchange and stored on the server so that they have access to all of them 24X7.
All licenses include free support in year 1 and optionally costs $31/month after that. Support consists of the following:
Available in these editions:one professional one enterprise