generated: '2026-06-20'
method: searched
source: https://developer.microsoft.com/en-us/graph/changelog
note: >-
  Microsoft Graph publishes a single dated changelog (filterable by version and
  category) plus an RSS feed; the live changelog is the source of truth. The
  Microsoft 365 Developer Blog (Outlook tag) carries feature/announcement posts.
  Entries below are recent Outlook-relevant highlights captured from the harvested
  blog feed in blogs/ — not the full Graph changelog.
scheme: dated
feeds:
  changelog: https://developer.microsoft.com/en-us/graph/changelog
  changelog_rss: https://developer.microsoft.com/en-us/graph/changelog/rss
  blog: https://devblogs.microsoft.com/microsoft365dev/tag/outlook/
current_versions: [v1.0, beta]
entries:
  - date: '2026-06-30'
    breaking: false
    highlights: Mailbox requirement set 1.16 now available for Outlook add-ins (Office.js).
    source: blogs/2026-06-30-mailbox-requirement-set-1-16-now-available-for-outlook-add-ins.md
  - date: '2026-03-26'
    breaking: true
    highlights: Breaking change — Graph API updates to sensitive email properties.
    source: blogs/2026-03-26-breaking-change-ahead-graph-api-updates-to-sensitive-email.md
  - date: '2025-11-19'
    breaking: false
    highlights: Ignite 2025 — what's new for Office add-ins.
    source: blogs/2025-11-19-ignite-2025-what-s-new-for-office-add-ins.md
  - date: '2025-05-06'
    breaking: false
    highlights: Nested App Authentication (NAA) now generally available across Outlook.
    source: blogs/2025-05-06-nested-app-authentication-now-generally-available-across.md
  - date: '2024-02-15'
    breaking: true
    highlights: Final reminder — Outlook REST API v2.0 and beta endpoints retired.
    source: blogs/2024-02-15-final-reminder-outlook-rest-api-v2-0-and-beta-endpoints.md