As of today, Microsoft Office 2016 is available for purchase or download. This means that Outlook 2016 is now also available as a new client for Exchange Server.
The package is also available for download from MSDN:
The download is available as an ISO and comprises just under 2.3 GB. Information on the new features can be found on the Office blog:
https://blogs.office.com/2015/09/22/thenewoffice/
One "highlight" concerns Outlook:
Outlook 2016 provides the smartest inbox yet, delivering lightning fast search, removing low priority mail automatically and making sure everyone on the To: line has the right access to modern, cloud-based attachments from OneDrive.
I'm going to try that out... I'm curious.
