Outlook on the web can only be used to access Office 365 for business and other accounts that are hosted on a server that's running Microsoft Exchange Server 2013.

For example, if you're using Office 365 for business, go to the Office 365 sign-in page. The web address you'll use to sign in to Outlook on the web depends on the type of account you have. You can use Outlook on the web to access the email, contacts, and calendar in your Office 365 for business or other Microsoft Exchange-based email via a web browser. Outlook on the web is the web browser version of Outlook that is used by businesses and organisations. To open a shared mailbox using Outlook instead of Outlook on the web, please refer to, KB0011033, Opening and using a shared mailbox in Outlook. This article explains how to access Outlook on the web, then open and send email from a shared mailbox. The administrator for your organisation must first create the shared mailbox, and add you to the group of users, before you can use it. If you have full access permission to a shared mailbox that appears in the address book, you can use Outlook on the web to open that mailbox. You can also use the shared mailbox as a shared team calendar.

A shared mailbox makes it easy for a specific group of people to monitor and send email from a public email alias like or When a person in the group replies to a message sent to the shared mailbox, the email appears to be from the shared mailbox, not from the individual user.

Opening and using a shared mailbox in Outlook on the webĪ team can benefit by using Outlook on the web, previously known as Outlook Web App (OWA), to work with a shared mailbox.

Outlook 365 open shared mailbox