THIS API IS BEING DEPRECATED - from November 1st, 2018, Google will stop supporting Basic Authentication in Outlook REST API v1.0. Additionally, starting on November 1st, 2019, Google will decommission the Outlook REST API v1.0 in favor of Microsoft Graph and Outlook REST API v2.0. The Microsoft Outlook REST API allows developers to access and integrate the functionality of Microsoft Outlook with other applications. Some example API methods include connecting to calendars, retrieving contacts, and finding people in a contact list. Microsoft Outlook is an email, calendar, and contact management system.