Yeastar and the EWS retirement
Microsoft Graph migration status from Yeastar's own notices. Last checked 2026-10-25.
Yeastar Workplace
- Status
- Not known yet
- Vendor notice
- https://help.yeastar.com/en/workplace/integration/microsoft365/connect-microsoft-365-account-with-yeastar-workplace.html
“For Microsoft 365/EWS, Microsoft requires that all OAuth apps request mailbox permission for EWS APIs”
Connect Microsoft 365 account with Yeastar Workplace, read 2026-10-25.
What to do. Yeastar Workplace's Microsoft 365 room calendar sync requests EWS API mailbox permission and no Graph plan is stated. Ask Yeastar whether it has moved to Graph before EWS is switched off.
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 Yeastar. 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.