Hi @Jobeth Teves ,
In Microsoft Outlook, you typically don’t need to change any settings to view emails in a shared mailbox once you have the necessary permissions.
A shared mailbox is a mailbox that multiple users can use to read and send email messages. These users can also share a common calendar and access the mailbox’s shared contacts. So, when a new member is added, they get access to all the existing emails in the shared mailbox.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.