office 365 outlook calendar

Jay Townsend 0 Reputation points
2026-09-03T00:15:41.2966667+00:00

my office 365 outlook calendar is not showing appointments. How fix

this?

Outlook | Windows | New Outlook for Windows | For home
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  1. Vikki-T 9,150 Reputation points Microsoft External Staff Moderator
    2026-09-03T06:25:01.8666667+00:00

    Hi Jay Townsend,

    I understand how confusing it can be when your appointments suddenly disappear from the Outlook calendar.

    At this point, I recommend that you review and try the steps provided in the AI generated answer on your thread. That reply typically include the most relevant checks for this scenario. 

    To narrow this down, could you let me know:

    • Are you using New Outlook, Classic Outlook, or Outlook on the web?
    • Is this a personal Microsoft account or a Microsoft 365 work or school account?
    • Are all appointments missing, or only appointments from a particular date or shared calendar?
    • Do the missing appointments appear when you sign in to Outlook on the web?

    In the meantime, please check the following:

    • Open Calendar and make sure the correct calendar is selected in the left pane. If you have multiple accounts or calendars, the appointments may have been saved under a different one.
    • Switch between Day, Week, and Month views, then navigate to the date when the appointments should appear.
    • Check that the calendar time zone matches your current location under Settings > Calendar > View.
    • Restart Outlook and install any available Office or Outlook updates.
    • If the appointments appear on Outlook on the web but not in the desktop application, the problem is likely limited to the local Outlook app. If you are using Classic Outlook, you can then try creating a new Outlook profile rather than deleting calendar data.

    If this is a work or school account and the appointments are also missing on the web, please contact your Microsoft 365 administrator so they can check the mailbox and calendar from the organization side.

    You can also refer to Microsoft’s guidance on changing the Outlook calendar view and troubleshooting missing or duplicate appointments.

    Please share the Outlook version and the result of checking Outlook on the web, and I can suggest the most appropriate next step. Thank you so much for your understanding.     

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

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  2. AI answer

    2026-09-03T00:15:58.89+00:00

    Try these fixes in order:

    1. Check the calendar in Outlook on the web.
      • If appointments appear there, the issue is likely with the Outlook app or its local settings.
    2. Reset the Outlook navigation pane.
      • Close Outlook.
      • Select Start, type outlook /resetnavpane, and press Enter.
      • Note: previously shared calendars must be added back afterward.
    3. Reset custom calendar views.
      • Close Outlook.
      • Select Start, type outlook /cleanviews, and press Enter.
    4. If Outlook on the web shows “This calendar isn’t available”, check for corrupted calendar items.
      • Run the Calendar Checking Tool for Outlook (CalCheck).
      • After installing it, run: 
             calcheck -f -r
      • Review the flagged items and remove any that are no longer needed.
    5. If the problem is only in New Outlook, clear the local Outlook cache.
      • Close Outlook.
      • Open Run and start: 
             olk.exe --devtools
      • In DevTools, clear Local Storage and Cookies for https://outlook.office.com.
      • Note: this removes temporary files and may require signing in again.
    6. Repair or reinstall Outlook if the issue continues.
      • Repairing or reinstalling can fix corrupted app files or configuration.
      • Risk: app settings and saved sign-in information may be reset.

    If the issue is only that one calendar entry count appears but the appointment details cannot be found, checking Outlook on the web first and then clearing the New Outlook cache is the most relevant path.

    References:

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

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