{
  "slug": "outlook-calendar",
  "name": "Outlook Calendar",
  "maker": "Microsoft",
  "category": "calendar",
  "verdict": "n",
  "answer": "No. Microsoft can read your Outlook calendar. Meeting invites go out as normal email, so your guests' providers can read them too.",
  "title": "Is Outlook Calendar encrypted? Events and invites",
  "description": "Microsoft can read your Outlook calendar, and meeting invites go out as normal email. Personal plans have no way to seal events. Checked at the source.",
  "parts": [
    {
      "key": "cal",
      "status": "n",
      "words": "Microsoft can read it",
      "note": "Microsoft's privacy statement lists meetings among the content it collects, and personal plans offer no way to seal events as of 25 October 2026.",
      "sources": [
        1
      ],
      "label": "Your events"
    },
    {
      "key": "invite",
      "status": "n",
      "words": "Microsoft can read it",
      "note": "Outlook sends each guest a meeting request by email, which Microsoft and the guest's provider can read.",
      "sources": [
        2,
        3
      ],
      "label": "Invites to others"
    },
    {
      "key": "pq",
      "status": "x",
      "words": "Not yet",
      "note": "No post-quantum protection announced as of 25 October 2026.",
      "sources": [],
      "label": "Post-quantum"
    }
  ],
  "extra_parts": [],
  "keys": "Microsoft holds them, and personal plans have no option to keep your own.",
  "can_see": "Everything in your calendar, including event titles, times, places, notes, attachments and attendees.",
  "business": "On business plans, meeting invites can be encrypted with a sensitivity label, but Microsoft says calendar items can only use its own Rights Management service, not S/MIME or Double Key Encryption.",
  "fix": null,
  "fix_line": null,
  "sections": [
    {
      "id": "is-outlook-calendar-end-to-end-encrypted",
      "q": "Is Outlook Calendar end-to-end encrypted?",
      "a": "No. Outlook.com and Microsoft 365 personal plans have no setting that seals calendar events so only you can read them, as of 25 October 2026. Microsoft's privacy statement lists meetings among the content it collects from its products [1]."
    },
    {
      "id": "are-outlook-meeting-invites-encrypted",
      "q": "Are Outlook meeting invites encrypted?",
      "a": "Not on personal plans. When you add attendees and select Send, Outlook sends each person a meeting request [2]. It travels like any other email, so Microsoft and each guest's provider can read it.\n\nOn work accounts, an admin can set up sensitivity labels that encrypt meeting invites [3]. Microsoft says calendar items can't use S/MIME or Double Key Encryption for this, only its own Rights Management service [3]."
    },
    {
      "id": "can-microsoft-see-my-outlook-calendar",
      "q": "Can Microsoft see my Outlook calendar?",
      "a": "Yes. Microsoft's privacy statement says it may access, keep and disclose your content, such as the content of Outlook.com emails, when it believes this is needed, for example to comply with the law or protect users [1].\n\nIf you add another account, such as Gmail, to the Outlook mobile app, Microsoft says its email, calendar and contacts also sync to Microsoft's servers [1]."
    }
  ],
  "sources": [
    {
      "title": "Microsoft Privacy Statement (last updated September 2026)",
      "publisher": "Microsoft",
      "url": "https://www.microsoft.com/en-us/privacy/privacystatement",
      "read": "2026-10-25"
    },
    {
      "title": "Schedule a meeting or event in Outlook",
      "publisher": "Microsoft",
      "url": "https://support.microsoft.com/en-us/outlook/calendar/schedule-a-meeting-or-event-in-outlook",
      "read": "2026-10-25"
    },
    {
      "title": "Use sensitivity labels to protect calendar items, Teams meetings, and chat",
      "publisher": "Microsoft",
      "url": "https://learn.microsoft.com/en-us/purview/sensitivity-labels-meetings",
      "read": "2026-10-25"
    }
  ],
  "changes": [
    {
      "date": "2026-10-25",
      "text": "First published."
    }
  ],
  "related": [
    "google-calendar",
    "icloud-calendar",
    "outlook",
    "microsoft-teams"
  ],
  "url": "https://isitencrypted.com/outlook-calendar/",
  "checked": "2026-10-25"
}