Remove Calendar From Outlook 2025 Desktop. Learn how to remove a shared calendar in outlook 365 with these simple steps. I have three microsoft accounts running through desktop outlook and the birthdays calendars reappeared on all of them, even though i had previously deactivated.

For some reason though, the calendar appears when the program is closed, (or open) as a transparent. You can delete or archive older calendar items to increase available storage space or just to clean up and organize your outlook calendar.