Adding another mailbox to your account on Outlook is a straightforward process, provided you have the required permissions or are happy to use another account to gain access to the mailbox.
When trying to set up a new email account or an IMAP account in Microsoft Outlook, you may encounter the 0x8004011c error. The pop-up says, An unknown error occurred ...
Follow the method below on how to create, manage and use Profiles on Outlook: How to create a profile in Outlook. How to manage, copy or delete a profile in Outlook. How to use a profile in Outlook.