While we do not cover Developer subjects very often on this blog, we wanted to let you know about this:

As some of you know, the Outlook REST APIs moved from preview to general availability in October 2014. As part of this transition, we are shutting down the old preview endpoint https://outlook.office365.com/ews/odata on October 15th, 2015. You can continue to use the https://outlook.office.com/api/beta endpoint to check out our latest and greatest APIs. We require all apps & services using the https://outlook.office365.com/ews/odata endpoint to move to https://outlook.office.com/api/v1.0 endpoint by October 15th, 2015. This will also enable the apps to benefit from API enhancements being added continuously to https://outlook.office.com/api/beta and https://outlook.office.com/api/v1.0.

Where do I go to find more about it?

If you want to know more about what features are supported by the https://outlook.office.com/api/ endpoint, go to https://dev.outlook.com/, where you will find getting started materials and API references. Please check https://dev.outlook.com/ for any future updates. You can also post your questions on Stack Overflow with outlook-restapi tag.

Deepak Singh