Click Configure manually and then Advanced config.Enter the name and e-mail address of the shared mailbox, but leave the Password field empty and uncheck Remember password.Click on Account Actions and select Add Mail Account.Open Thunderbird, click on the Thunderbird Menu button and select Account Settings.The mailbox should now be added to your view in Outlook in the Office 365 Portal.A personal mailbox must be setup first (see above) before you can add a shared mailbox in Thunderbird.Enter the email address of the shared mailbox (e.g.Right-click 'Folders' and click 'Add shared folder'.You may want to collapse top-level groups to make it easier to find 'Folders'. On the lefthand navigation, find the 'Folders' section/heading.Method 3: Add a Shared Mailbox to your View in Office 365 (persistent)

Enter the name (or first few letters of the mailbox) in the mailbox field, select the mailbox, and click 'Open'.

Click your user icon (upper right) and select the option 'Open another mailbox'.

Access 'Outlook' by clicking the waffle icon (upper left) and clicking 'Outlook'.

Method 2: Open a Shared Mailbox using the Office 365 Portal (one-time) Enter the shared mailbox's e-mail address and click Show URL to see the URL. The tool below will display the Outlook Web Access URL for a shared mailbox.

E-mail Address: OWA URL: When prompted to log in, enter your eName and ePassword.

The URL for a shared mailbox is The example below illustrates what the Outlook Web Access URL would be for a shared mailbox that has the given e-mail address:

Note that you must access Office 365 OWA with a supported browser because you need to use the 'Full' version of Outlook Web App to configure rules.

Open a web browser using a supported browser such as the latest version of Firefox, Internet Explorer, or Safari.

Method 1: Open a Shared Mailbox Using a Direct Link to Office 365 OWA Members of a Shared Mailbox's permissions group have the ability to access a Shared Mailbox using the Office 365 Portal using any of the methods documented below. Resource Coordinators: Accessing a Shared Mailbox using the Office 365 Portal

Open shared mailbox outlook online