Accessing Shared Mailboxes from Webmail in O365 

How do I open a shared mailbox?

There are two ways to open a shared mailbox using Outlook Web App. 

Method 1 - Add the shared mailbox so it displays under your primary mailbox in Outlook Web App

This method is recommended if you want to monitor the email from your primary mailbox and the shared mailbox at the same time. In addition, after you complete this task, the shared mailbox and its folders are displayed in the left navigation pane each time you open Outlook Web App.

  1. Sign in to your account in Outlook Web App.
  2. Right-click your primary mailbox in the left navigation pane, and then choose add shared folder.
  3. In the add shared folder dialog box, type the name or email address of the shared mailbox, and then click add.

The shared mailbox displays in your Folder list in Outlook Web App. You can expand or collapse the shared mailbox folders as you can with your primary mailbox. You also can remove the shared mailbox from your Folder list. To remove it, right-click the shared mailbox, and then click delete.

Method 2 - Open the shared mailbox in a separate browser window

We recommend that you use this method if you want to view and manage the email for the shared mailbox in its own browser window.

  1. Sign in to your account in Outlook Web App.
  2. On the Outlook Web App nav bar, click on your name. A list appears.
  3. Click Open another mailbox.
  4. Type the email address of the other mailbox that you want to open. Another Outlook Web App session opens in a separate window, allowing access to the other mailbox.