A little while ago, Microsoft began rolling out a brand new Outlook client. It arrived for consumers first, and Microsoft got to work on making the client work for enterprise users, too. Originally, Microsoft wanted to get all its enterprise users moved over to the new Outlook in April 2026; however, in a recent message, the company has confirmed that it has pushed back the deadline to March 2027, citing the need for businesses to prepare for the change and for Microsoft itself to work on feedback.