If you no longer need your cPanel email to be connected to Outlook, or you need to re-add it for troubleshooting, you can follow this guide to delete your cPanel email from Outlook.
Delete Account
In the ribbon of Outlook, click
File
->Account Settings
->Account settings
.you will see all email accounts connected to Outlook. Highlight the cPanel email you wish to delete.
While the email account is highlighted, click
Remove
above the email.