[Update 2 Dec 2014 — Microsoft’s Rajesh Jha confirmed that they have acquired Acompli, writing that Microsoft did so as a part of its commitment to mobile experience:
In a world where more than half of email messages are first read on a mobile device, it’s essential to give people fantastic email experiences wherever they go.
An overeager Microsoft exec, Rajesh Jha, created a post on the official Microsoft blog with the URL http://blogs.microsoft.com/blog/2014/11/25/microsoft-acquires-acompli/, as reported by Mark Wilson, which as the URL indicates, makes it look like Microsoft has acquired Acompli. Acompli is an email application with integrated calendar that some have called the mobile Outlook that Microsoft should have made. When you click the link it takes you to a ‘page not found’ landing page, but Mark Wilson has a screenshot of a page that has apparently been deleted.
Accompli has several clever features, including a people-first presentation of email, and a means to quickly share available times for meetings via email.
I expect we’ll learn more about this turn of events after the Thanksgiving holiday week. It is likely that the deal is done, since creating a blog post about it would be one of the last things to be done.