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From the main Outlook window, select File in the upper left corner of the screen.
Note: For Outlook 2007, select Tools > Account Settings and skip to step 3. -
Select Account Settings > Account Settings.
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Select the account you want to delete, then select Remove.
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You'll see a message warning you that all offline cached content for this account will be deleted. This only affects content downloaded and stored on your computer.
Select Yes to confirm.
Important: If you want to delete the last or the only email account you have in Outlook, you'll receive a warning that you must create a new location for your data before removing the account. For more information, see Create an Outlook Data File.
