Office 365 users get a blank page when they use Outlook Web App to access a shared mailbox

Applies to: Exchange Online

PROBLEM

Office 365 users see a blank page when they try to access a shared mailbox by using Outlook Web App. 

This problem occurs because you can't use Outlook Web App in Office 365 to directly access a shared mailbox.

SOLUTION

To open a shared mailbox in Outlook Web App, follow these steps:
  1. Sign in to the Office 365 portal.
  2. Click Outlook.
  3. In the upper-right corner of the page, click the user name, and then click Open another mailbox.
  4. Type the name of the shared mailbox, and then click Open.
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