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outlook calendar went missing

Steve Hartshorne 0 Reputation points
2026-03-12T02:07:50.6566667+00:00

outlook calendar missing after upgrade? to new outlook

Outlook | Windows | New Outlook for Windows | For home
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  1. Arlene D 36,075 Reputation points Independent Advisor
    2026-03-12T05:28:31.6533333+00:00

    Hello!

    Check Settings > Calendar to ensure your account is listed and syncing, and make sure your calendars are checked in the Calendar pane. If missing, add your account again. For more advanced troubleshooting, you can clear the cache by closing Outlook, deleting the %localappdata%\Microsoft\Outlook cache folder, then restarting Outlook, or use the Microsoft Support and Recovery Assistant to detect sync or account issues.

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  2. Xpostalworker 0 Reputation points
    2026-06-18T01:46:20.07+00:00

    I found this solution in the chat from a comment under Microsoft's Learn forum. Here's the part that matters: Going to and Clicking the Settings (gear icon), navigate to Calendar > View, and untick the Birthday Calendar option doesn't take you to the same place where you can add a calendar. I found a calendar button in the MS 365 tool bar on the left side of the screen. As soon as I opened the calendar from there I could see the entire spread sheet for setting up appointments. I immediately found the option to "add calendar" on the lower left side. As soon as I made a new calendar the tick box for birthdays was the first option at the top and it was enabled, so I unticked it. Boom all done.

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  3. Winnie-B 8,220 Reputation points Microsoft External Staff Moderator
    2026-03-16T07:07:20.77+00:00

    Hello Steve Hartshorne

    I’m happy to help you with this today. Your calendar likely went "missing" because the New Outlook handles data differently than the Classic version. Specifically, it does not support local-only folders that aren't synced to a cloud server.

    To avoid repeating the Q&A Assist's reply, could you confirm have you tried those steps? If yes, what happened?

    In addition, please try the following steps:

    1, Toggle the Calendar View

    Before moving data, ensure the calendar isn't simply hidden in the new UI.

    • Click the Calendar icon on the far-left navigation bar.
    • In the left-hand folder pane, look under "My Calendars."
    • Ensure the checkbox next to your account's calendar is checked.

    2, Export from Classic Outlook

    If the calendar is empty in the New Outlook, your data is likely still stored in the "Classic" version.

    • Use the toggle in the top-right corner to return to Classic Outlook.
    • Verify your events are there, then go to File > Open & Export > Import/Export.
    • Choose Export to a file > Comma Separated Values (.csv) and select your Calendar.
    • Switch back to New Outlook.
    • Go to Add Calendar > Upload from file and select your .csv file to sync it to your cloud account.
    1. Repair the New Outlook App

    If your calendar is cloud-based (e.g., @outlook.com) but still isn't showing:

    • Go to Windows Settings > Apps > Installed Apps.
    • Find Outlook (new), click the three dots (...), and select Advanced options.
    • Click Repair.

    Please feel free to let me know how it goes so I can help you further. I truly appreciate your time and understanding.


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  5. AI answer

    2026-03-12T02:08:05.48+00:00

    After upgrading to new Outlook for Windows, calendar issues can occur for different reasons depending on platform and build.

    For Outlook for Mac using Legacy Outlook, there is a known issue where calendars don’t display in the left pane and the calendar view is blank after upgrading to build 16.63. This was fixed in Outlook for Mac build 16.64. Updating Outlook for Mac to at least build 16.64 restores calendar visibility.

    If the issue is specifically with Internet calendars not appearing after adding them in new Outlook for Windows, some Internet calendar servers reject Outlook’s modern authentication broadcast so the calendar is never added and no error is shown. In that case, the workaround is:

    1. Sign in to Outlook on the web.
    2. Go to Calendar.
    3. Use Add calendarFrom internet (or Subscribe from web) and provide the Internet calendar URL.
    4. Save the calendar.

    The subscription is then managed by Exchange, and the calendar appears under Other Calendars in Outlook clients.

    If the calendar is a standard Exchange/Outlook.com calendar that has stopped syncing or appears empty after migration or changes, reconnecting the Outlook.com account to Outlook for Windows can restore proper sync of calendars and email.

    If none of these scenarios match (Mac build issue, Internet calendar subscription, or Outlook.com migration), running a calendar diagnostic can help detect problems with permissions, free/busy, delegates, and problematic items:

    • Use Microsoft Support and Recovery Assistant’s Outlook Calendar diagnostic (SetupProd_CalCheck.exe) to scan the calendar automatically.
    • Or use the Calendar Checking Tool for Outlook (CalCheck) to scan an Exchange-based calendar and generate a report of issues.

    References:

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

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