Outlook for Mac 2016 and Outlook for Mac for Office 365.
Supported versions of Outlook for Exchange Server. Outlook on the web (formerly known as Outlook Web App) for Exchange 2016 or later Public folders are available in the following Outlook clients:
Users will see the full hierarchy in Outlook, which makes it easy for them to find the content they're interested in. Public folders help make content in a deep hierarchy easier to browse. Public folders are designed for shared access and provide an easy and effective way to collect, organize, and share information with other people in your workgroup or organization.
