Hornetsecurity and the EWS retirement

Microsoft Graph migration status from Hornetsecurity's own notices. Last checked 2026-10-21.

365 Total Backup

Status: Migration announced
Date: 2026-10-09
Vendor notice: https://www.hornetsecurity.com/en/blog/microsoft-open-graph-365-total-backup/

“Extended Graph API-based backup support to In-Place Archives and group mailboxes, further advancing the transition from Exchange Web Services (EWS).”

365 Total Backup - Release October 9 2026 (Hornetsecurity) (2026-10-09), read 2026-10-21.

What to do. The 15 September 2026 release added Graph-based mailbox backups, and the 9 October 2026 release extended them to In-Place Archives and group mailboxes. Hornetsecurity calls this further progress in the move from EWS. Some customers may be asked to regrant Microsoft 365 permissions inside 365 Total Backup.

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Application IDs

832b88db-632e-452e-90f0-b4c769cc787d Altaro Office 365 Backup (Hornetsecurity 365 Total Backup)

Every app in your tenant

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