The new version of OWA (sometimes called Outlook on the Web, or Outlook Web Access) is now generally available to all Office 365 tenants. Although the new OWA has some nice features, you might want to turn off the user choice (toggle) to move the new UI until you’ve had time to prepare the help desk, documentation, and that sort of thing.
The new version of OWA is maturing and new features are turning up on a weekly basis. You can now schedule a Teams meeting from OWA and the prospect of joyful animations hang in the air. But only for Office 365 users as there’s no sign that the new OWA will come to Exchange on-premises servers.
Microsoft has refreshed the Outlook Mobile architecture. They suggest that you run some PowerShell to report clients connecting via the old and new architectures. Their code works, but we think ours is better.
Microsoft has a new OWA user interface in targeted release. So far it all looks good even if some features are still missing, Expect to see the new UI generally available in late 2018 or early 2019.
Microsoft has published some statements about not allowing older Office clients to connect to Office 365 from October 2020. Well, the word “allow” should really be read as “support.” Or so we hear.