Using New Outlook on Windows for personal email, calendar, and contact management
Dear Sloan Andres,
Good day! Thank you for posting to Microsoft Community. We are happy to assist you.
I'm sorry to hear that you're having trouble adding a shared inbox in Outlook. It sounds like you have more than one Exchange account configured in your mail profile. The option to add additional mailboxes to an Exchange account is only available for the Exchange account that is set as your default (primary) account. To better understand the issue and provide possible solution, we need more details from you, please kindly provide us the following information. Thanks in advance!
- May I please double confirm if you have more than one Exchange account in your Outlook profile? if yes, please kindly check all email accounts advanced settings if you are able to add a shared inbox to one of your accounts.
- You may also create new Outlook profile for the account you want to add the shared inbox in to and follow the steps you mentioned above and check if you can add the shared inbox as additional mailbox/folder. To create new Outlook profile, you can refer to Create an Outlook profile - Microsoft Support
I look forward to your update,
Thank you for your precious time. Have a nice day.
Sincerely,
Libeamlak | Microsoft Community Moderator