Phased disablement of Exchange Web Services begins 1 October 2026.
Permanent shutdown 1 April 2027.
UK South onlyCyber Essentials PlusISO 27001Microsoft Solutions Partner
For Dynamics 365 CE on-premises customers using Exchange Online
On 1 October 2026, server-side sync stops working. We build the bridge that keeps it
running.
When EWS is disabled, the Outlook server profile in your on-premises CE organisation can
no longer reach Exchange Online mailboxes. We replace the EWS layer with a Microsoft Graph
bridge — same end-user experience, modern auth, no ACS.