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Resource Coordinators: Accessing a Shared Mailbox using the Office 365 Portal

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.

Method 1: Open a Shared Mailbox Using a Direct Link to Office 365 OWA

  1. Open a web browser using a supported browser such as the latest version of Firefox, Internet Explorer, or Safari. 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.
  2. Enter the URL for the shared mailbox. The URL for a shared mailbox is https://outlook.office365.com/owa/shared_mailbox@mail.
    colostate.edu    . The example below illustrates what the Outlook Web Access URL would be for a shared mailbox that has the given e-mail address:

    • E-mail Address: shared_mailbox@mail.colostate.edu
    • OWA URL: https://outlook.office365.com/owa/shared_mailbox@mail.colostate.edu

  3. When prompted to log in, enter your eName and ePassword.

Shared Mailbox OWA URL Tool

The tool below will display the Outlook Web Access URL for a shared mailbox. Enter the shared mailbox's e-mail address and click Show URL to see the URL.

OWA URL:


Method 2: Open a Shared Mailbox using the Office 365 Portal (one-time)

  1. Log into Office 365 by navigating to https://portal.office.com
  2. Access "Outlook" by clicking the waffle icon (upper left) and clicking "Outlook".
  3. Click your user icon (upper right) and select the option "Open another mailbox"
  4. Enter the name (or first few letters of the mailbox) in the mailbox field, select the mailbox, and click "Open".


Method 3: Add a Shared Mailbox to your View in Office 365 (persistent)

  1. Log into Office 365 by navigating to https://portal.office.com
  2. Access "Outlook" by clicking the waffle icon (upper left) and clicking "Outlook".
  3. On the lefthand navigation, find the "Folders" section/heading. You may want to collapse top-level groups to make it easier to find "Folders".
  4. Right-click "Folders" and click "Add shared folder".
  5. Enter the email address of the shared mailbox (e.g. ACNS_shared_mailbox1@mail.colostate.edu)
  6. Click Add.
  7. The mailbox should now be added to your view in Outlook in the Office 365 Portal.