Scheduling and managing events using Outlook.com calendar
Hi Joe Browning
From your post, I understand how concerning it can be when your calendars suddenly disappear.
Before troubleshooting further, could you confirm whether you're using a personal Microsoft account (such as Outlook.com, Hotmail.com, Live.com, or Microsoft 365 Personal/Family) or a work/school account?
In addition, please also let me know:
- When did the calendars go missing?
- Are you missing all calendars or only specific ones?
- Do you see the same issue in both Outlook on the web and the Outlook app?
In the meantime, if you're using a personal Outlook.com or Microsoft 365 Personal account, please try the following:
- Open Outlook on the web at https://outlook.live.com/
- Go to "Calendar".
- In the left pane, expand "My calendars" and look for any calendars that may have become unchecked or collapsed.
- If they are listed, select the checkbox next to each calendar to make it visible again.
Looking forward to your reply so I can assist you further. Thanks for your understanding.