How to Access a Shared Mailbox
Outlook Desktop App for Windows 10:
Adding Another Mailbox in Outlook 365
- Open Microsoft Outlook 365.
- Click on the File tab.
- Navigate to the Info tab.
- Select Account Settings.

In the Account Settings window, select your current mailbox and click Change.

On the following screen, click on More Settings.
Go to the Advanced tab and click on the Add button.
Enter the name of the mailbox and click OK.
After entering the mailbox name, click Add and then Apply.
Complete the wizard by clicking Next, followed by Finish on the Change Account screen.
Exit the Account Settings screen, then select your new mailbox in the mail pane to populate it with your messages.
Outlook Web Version:
- Sign in to your email at https://outlook.office.com/
- Click on your initials in the top right corner to open the dropdown menu.
- Select Open another mailbox and enter the email address of the mailbox you want to open.
Outlook Desktop App for Mac.
Select Other User's Folder.
Select Inbox from the folder type drop-down menu.
Enter the Title of your shared folder in the search box.
Select your Shared Mailbox from the list.
Select Open.