After a group outlives its intended purpose, group owners can delete it to free up system resources and to remove the group from being listed or displayed.
Warning: When you delete a group, you're permanently removing everything related to this group, including conversations, files, the group notebook, and Planner tasks. If you deleted the group by mistake, you can ask your IT admin to recover the group within 30 days of it being deleted.
Only group owners can delete a group.
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Open Outlook for Windows.
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Under Groups on the left nav bar, select your group.
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Select Edit Group on the ribbon.
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Click the Delete group button in the lower left corner of the window.
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Select I understand that all group content will be deleted > Delete.
Note: If the instructions don't match what you see, you might be using an older version of Outlook on the web. Try the Instructions for classic Outlook on the web.
Only group owners can delete a group.
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In the left pane, under Groups, select your group.
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At the top of the page, select
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Select Edit group.
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At the bottom of the Edit group window, select Delete group.
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Select the check box next to I understand that all group content will be deleted and select Delete.
Instructions for classic Outlook on the web
Only group owners can delete a group.
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In the left pane, under Groups, select your group.
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At the top of the page, select
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At the bottom of the Edit group pane, select Delete group.
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Select the check box next to I understand that all group content will be deleted and select Delete.
Only group owners can delete a group.
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Open the Outlook mobile app.
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Select Groups from the folder pane.
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Tap the name of the group that you want to delete.
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Tap the group name to go to the Group Details page.
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Tap Edit.
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Scroll to the bottom of the page and tap Delete Group.
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To confirm the deletion, type "delete," and then tap Delete Group.
See Also
Edit or delete an Outlook.com group
