Outlook hangs on updating inbox
The production-ready version of Focused Inbox for Mac clients will get released "6-8 weeks after First Release completes," Microsoft's updated blog post explained, which perhaps translates to a June 2017 completion date.
The Web (Outlook.com) version of Focused Inbox will follow the same release schedule as the Mac client described above.
New details about Focused Update's progress will get added to the July 26, 2016 blog post, Microsoft promised.
Microsoft also has a general Office 365 Roadmap page where users can search for details on specific features.
IT pros have to enable it by making some schema changes to the taskpane add-in's "manifest." Details are described in Microsoft's documentation.
It probably crashes when Outlook tries to show the corrupt message in the Reading Pane and not when it actually gets selected.
In the meantime, though, Microsoft MVP Paul Cunningham has written a Power Shell script designed to alert IT pros by e-mail of any new Message Center notices.
So, in case that this is your scenario, the only advice that I can offer is: Be patient and read the information 🙂 By default, Outlook client is configured with the option of cache mode.
Mac clients (running Mac OS 15.26 or greater) will be getting a very long rollout of the test version of Focused Inbox.
The feature initially started rolling out to "first-release" testers back in November, but the "expected completion" date for that preview rollout is now listed as happening in April 2017.
Outlook 2016 for Windows users right now have no information about when Focused Inbox will be available, even for testing.
Microsoft indicated in a footnote that it still has "some work to complete" on the Windows desktop version of Focused Inbox.