Outlook.com, Microsoft's web-based email and calendaring client, is now open to third-party developers who want to build tools on top of it. Using the Outlook API, developers can build what ...

Microsoft Outlook is an email platform featuring calendars, contacts, file-sharing, and more. Microsoft folded MSN and Hotmail into Outlook years ago.

1] Enable Developer Mode in Microsoft Outlook via Outlook Options By default, the Developer tab remains disabled in Microsoft Outlook and all other Office applications.

Microsoft has released its new Outlook client with updated features to members of the Office Insider channel.