Shared Mailbox Support for Outlook Mobile Announced
Microsoft has announced in the Community Portal that the Outlook Mobile App for iOS and Android will soon support shared mailboxes from Exchange Online. The software company has not announced a specific release date, but indicates availability in the coming weeks.
Shared mailboxes are fully functional Exchange mailboxes, with inbox, calendar and contact management, which are used for shared filing in a team. Although these mailboxes do not require a license of their own, they are blocked for interactive login.
Source: Microsoft