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From October 1 2026, users will need to migrate to Microsoft Graph, even though the company admits it has shortcomings
When Microsoft discontinues support for its cross-platform API, users of Exchange Online who rely on EWS will lose access to their email and contact lists.
Microsoft is set to start blocking EWS requests from non-Microsoft apps to Exchange Online from October 2026. However, it's worth noting that this change will only apply to Microsoft 365 and Exchange
Microsoft removes the August Exchange Server security update after admins complain it disabled their server installations.
For this month's Patch Tuesday, Microsoft dealt with 84 flaws and a zero-day vulnerability affecting Microsoft Exchange that hasn't yet been fully resolved.