https://www.live-feeds.com/feed/mc1485116-exchange-online-enforces-ewsallowedappids-requirement-on-october-10Continuously updated, source-cited coverage. https://www.live-feeds.com/feed/mc1485116-exchange-online-enforces-ewsallowedappids-requirement-on-october-10https://www.live-feeds.com/feed/mc1485116-exchange-online-enforces-ewsallowedappids-requirement-on-october-10#u108037Wed, 07 Oct 2026 07:08:19 +0000Microsoft is ending the EWSEnabled=True fallback within Exchange Online, requiring administrators to whitelist applications by October 10 or face disruptions with third-party tools. This enforcement impacts Microsoft 365 work accounts and Mac email synchronization. Administrators must inventory applications utilizing Exchange Web Services and construct an explicit allow list. While Microsoft plans to auto-populate portions of the list between October 8 and October 9 using traffic from the prior 60 days, teams are advised to build their own lists to prevent blind spots and service interruptions