Halo and the EWS retirement
Microsoft Graph migration status from Halo's own notices. Last checked 2026-10-25.
HaloPSA / HaloITSM Exchange calendar sync
- Status
- Moved to Microsoft Graph
- Vendor notice
- https://www.usehalo.com/guides/1198
“This guide covers how to connect to the Exchange Calendars integration using the Microsoft Graph API connection method.”
Guides - Syncing Exchange Calendars using the Microsoft Graph API, read 2026-10-25.
What to do. Halo has a Graph connection method for Exchange calendar sync, while the EWS methods are kept in a separate guide. Move calendar sync to the Graph method; the page does not cover mailboxes.
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 Halo. 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.