BusyMac and the EWS retirement
Microsoft Graph migration status from BusyMac's own notices. Last checked 2026-10-25.
BusyCal for Mac (Office 365 accounts)
- Status
- Moved to Microsoft Graph
- Vendor notice
- https://www.busymac.com/docs/busycal/140983-using-busycal-with-office-365-microsoft-graph/
“we have transitioned our syncing mechanism for Office 365 accounts to utilize Microsoft Graph API, Microsoft's latest sync offering.”
Using BusyCal with Office 365 (Microsoft Graph), read 2026-10-25.
What to do. BusyCal syncs Office 365 accounts through Microsoft Graph and notes Microsoft's EWS blocking starts 1 October 2026, full shutdown 1 April 2027. Some old secondary calendars visible over EWS may not appear over Graph.
BusyCal for iOS (Office 365 accounts)
- Status
- Moved to Microsoft Graph
- Vendor notice
- https://www.busymac.com/docs/busycalios/using-busycalios-with-office-365-microsoft-graph/
“we have transitioned our syncing mechanism for Office 365 (Microsoft 365) accounts to utilize Microsoft Graph API, Microsoft's latest sync offering.”
Using BusyCal for iOS with Office 365 (Microsoft Graph), read 2026-10-25.
What to do. BusyCal for iOS syncs Microsoft 365 accounts through Microsoft Graph and notes Microsoft's EWS blocking starts 1 October 2026, full shutdown 1 April 2027.
One email from ewsappid.com each time a status on this page changes, nothing else, and none after 1 April 2027. Every alert has an unsubscribe link; one press deletes your address, or write to support@ewsappid.com at any time. Sender details are on the contact page; see the privacy policy.
Application IDs
This site lists no fixed application ID for BusyMac. Look up an ID from your EWS usage report on the home page, or find the name behind it in Entra, under Enterprise applications.
Every app in your tenant
The tenant plan reads your EWS usage report in your browser and matches each app against these statuses and your current allow list. All vendor statuses.