Sync Issues in Apple Mail with Microsoft 365 Accounts

Microsoft has begun disabling Exchange Web Services (EWS) by default in Exchange Online, which will affect the syncing of Microsoft 365 work accounts in the Mail and Calendar apps on Mac. This change has been anticipated, as Microsoft stopped adding new features to EWS in 2018 and announced that the complete shutdown of the protocol would start in October 2026.

## Why it matters This shift is significant for Mac users who rely on Apple Mail to manage their Microsoft 365 emails, as it could disrupt their access to emails and calendars. As EWS is phased out, users may face syncing issues, complicating their daily workflow.

## What we know Microsoft has indicated that organizations that choose to keep EWS running will not be affected immediately. However, the rollout of this change will be phased, meaning that some users may lose access sooner than others. Furthermore, IT administrators still have the option to restore access to EWS, but this will depend on the decisions made by the organizations.

## What is still unclear It remains unclear how many Mac users will be affected by this change and whether Microsoft will provide alternatives for syncing Microsoft 365 accounts. Additionally, it is unknown if there will be support options available for those who encounter issues after EWS is disabled.