Over the last few years, we have been investing in services that help developers access information in Office 365 in a simple and intuitive way, specifically through Microsoft Graph. Microsoft Graph and the use of OAuth 2.0 provide increased security and seamless integration with other Microsoft cloud services and is rapidly expanding developer access to the rich data sets behind Microsoft applications. As we make progress on this journey, we have continued to evaluate the role of Exchange Web Services (EWS). Today we are sharing our plans to move away from Basic Authentication access for EWS over the next two years, with support ending Oct. 13, 2020.
These plans apply only to the cloud-based Office 365/Exchange Online products; there are no changes to EWS capabilities of on-premises Exchange products.
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