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Outlook calendar entries disappeared.

LINDA MARSHALL 0 Reputation points
2026-05-18T21:12:09.7866667+00:00

Prior to today, I've been able to access calendar entries for several prior years. Now (5/18/26) I can only get access to entries from 5/17/25. That is only for the past year. This is a serious problem for me because I kept important personal info on the calendar. I've got a Dell laptop, neither Dell tech nor university tech has been able to access the earlier data. Hopefully, someone has solved a similar problem.

Outlook | Web | Outlook.com | Calendar

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  1. Chloe-L 13,660 Reputation points Microsoft External Staff Moderator
    2026-05-19T04:42:27+00:00

    Hi LINDA MARSHALL,

    Thank you for reaching out, and I'm really sorry to hear that your calendar entries have suddenly become inaccessible. I can completely understand how unsettling this is, especially when those entries hold important personal information. The good news is that in most cases like this, the older entries are still safely stored on the server, and it's only the local view that's affected. Let's work through this together step by step.

    Step 1: Check Outlook on the web

    Please sign in to your account at [ https://outlook.live.com] (or [ https://outlook.office.com] if it's a work/school account) and open the Calendar. Navigate back to dates older than 5/17/25 and let me know whether the older entries appear there.

    If the older entries are still visible on the web:

    • If you're using the new Outlook, toggle New Outlook off (top-right corner) to revert to classic Outlook, where the full calendar history typically displays correctly.
    • If classic Outlook isn't available to you, you can always continue viewing your older entries through Outlook on the web (Step 1).

    If you're already on classic Outlook, try expanding the offline sync window:

    • Go to File → Account Settings → Account Settings.
    • Select your email account, then click Change.
    • Move the Mail to keep offline slider all the way to All.
    • Click Next, then Done, and restart Outlook.
    • Allow Outlook a little time to sync — your older calendar entries should gradually reappear.

    While in Outlook, go to the View tab and select Reset View, in case a filter is unintentionally hiding older items.

    If older entries don't appear on the web either, please share the following so I can look into it more closely:

    1. Whether your account is a personal Outlook.com / Hotmail account or a university (work/school) account.
    2. Whether you noticed any large Windows or Outlook update around 5/17–5/18.

    I'll be here whenever you're ready with an update. Looking forward hearing from you.

    Warm regards,

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  2. AI answer

    2026-05-18T21:12:20.4466667+00:00

    For Mail and Calendar on Windows 10 and similar calendar clients, older events may no longer be displayed locally even though they are still present in the mailbox.

    The date range of events that are visible depends on account type and device:

    • On a PC:
      • Outlook.com / Exchange / Microsoft 365 (Exchange ActiveSync): past 3 months of events are shown; all future events are shown.
      • Google / iCloud: past 3 months of events are shown; events up to 6 months in the future are shown.
    • On a mobile device:
      • Outlook.com / Exchange / Microsoft 365 (Exchange ActiveSync): past 2 weeks of events are shown; all future events are shown.
      • Google / iCloud: past 2 weeks of events are shown; events up to 6 months in the future are shown.

    Events outside these ranges are not deleted; they simply are not synchronized or displayed in that app. To access older calendar entries, use the calendar on the web (for example, Outlook on the web / Outlook.com in a browser) or another app that does not limit the visible date range in the same way.

    If the older events appear in the web calendar but not on the laptop, the behavior is due to this sync range limitation. If they also do not appear on the web, further investigation outside this provided guidance would be required.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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