Microsoft's migration of Outlook.com to a new underlying experience looks to be running behind the company's self-imposed schedule, and now may not be done until the first half of 2017.
Microsoft has been working to migrate its Outlook.com users to a new Outlook.com mail client since May 2015. And the process is proving more complicated than the Softies expected.
Last we heard, Microsoft's self-imposed goal for completing
the migration of the vast majority of Outlook.com users to the new experience was end of August 2016. I asked on August 15 if this was still the goal, and a spokesperson told me "Microsoft still expects the vast majority of accounts to be upgraded by the end of summer."
But I guess something's happened in the past few days, as it now is looking like Microsoft isn't going to meet that goal -- at least for Outlook.com customers who have shared calendars.