Microsoft offers a temporary fix for broken Exchange Online EWS apps

Feeds.4Sysops •IT News • October 22, 2026

Microsoft says admins can restore Exchange Online apps disrupted by EWS blocking by temporarily re-enabling the API, but that workaround ends in April 2027. The change follows the EWS app allow-list enforcement ; Microsoft’s longer-term advice is to update affected apps to use Microsoft Graph instead. Source

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Microsoft Provides Temporary Fix for EWS API Disruption Microsoft announced that IT administrators can temporarily re-enable the Exchange Web Services (EWS) API in Exchange Online to restore functionality for affected applications. This fix comes as part of the EWS API retirement process, which began on October 1, 2026, and will culminate in a complete shutdown by April 1, 2027. The EWS API is crucial for various applications, including Outlook and Apple Mail, and its disabling has led to errors for users. Microsoft recommends that app developers transition to the Microsoft Graph API for long-term solutions. The EWS retirement follows a series of warnings from Microsoft, including a 2018 notice about the deprecation of certain EWS functionalities. Administrators can re-enable EWS through the Microsoft 365 admin center or via PowerShell commands. However, they are encouraged to update their applications to versions that do not rely on EWS. 2 sources 28

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Platforms (3)

EWS Exchange Online Microsoft Graph