This article explains how to add users to a shared Outlook mailbox, and how to use shared mailboxes in Outlook on the web, and from a mobile app. These instructions apply to Office 365 for Windows and macOS; Outlook 2019, 2016, 2013, and 2010; Outlook for iOS and Android; and Outlook on the web.
How to Create and Access a Shared Outlook Mailbox – Shared Mailbox Office 365 Tutorial for Beginners
You can create as many shared mailboxes as you need, but each user you assign to the mailbox must have a Microsoft 365 subscription. To set up a shared mailbox:
Sign in to the Microsoft 365 admin center using your Microsoft 365 global admin account or your Exchange admin account credentials.
In the navigation pane, select Groups > Shared Mailboxes.
