Open Outlook
In the folder pane, right-click the folder you want to delete
Select Delete Folder
Confirm the deletion if prompted
To delete a subfolder, right-click the subfolder and select Delete Folder
To delete multiple folders, repeat the steps for each folder
If the folder is in a shared mailbox or archive, make sure you have permission to delete it
If the folder cannot be deleted, check whether it is a default system folder or protected folder