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
Modern Auth comes to on-prem Exchange Server deployments theregister.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from theregister.com Daily Mail and Mail on Sunday newspapers.