Hi @Thomas G. Barstad ,
Welcome to our forum!
Does this issue occur in Outlook desktop client?
If so, please open your Outlook calendar.
- In the search bar, type “birthday” to filter all the birthday events.
- Click on any of the filtered events to select it.
- Press on your keyboard to select all the filtered events.
Ctrl + A
- Press the key on your keyboard to delete all the selected events.
Delete
Hope to help you!
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