To resolve this issue in Outlook 2016 for Mac with Exchange Server 2016 or Exchange Server 2013, install the following updates:
On the Outlook 2016 for Mac client: Install the April 12, 2016, update for Outlook 2016 for Mac (version 15.21.1), or a later update. For information about this update, click the following article number to view the article in the Microsoft Knowledge Base:
3142577 MS16-042: Description of the security update for Office 2016 for Mac: April 12, 2016
On the Exchange Server: Install Cumulative Update 2 for Exchange 2016, or Cumulative Update 13 for Exchange Server 2013, or a later cumulative update. For information about these updates, click the following article number to view the article in the Microsoft Knowledge Base:
The following table summarizes the access state for Outlook 2016 for Mac (post the April 2016 update) access to public folders, and the minimum exchange CU required to enable access:
| Public folder deployed on: | User mailbox on E2010 SP3+ | User mailbox on E2013 | User mailbox on E2016 | User mailbox on Office 365 Exchange Online |
| Exchange Server 2010 SP3+ | Yes | Yes | Yes | Not supported |
| Exchange Server 2013 CU13+ | Not supported | Yes | Yes | Yes |
| Exchange Server 2016 CU2+ | Not supported | Yes | Yes | Yes |
| Office 365 Exchange Online tenant | Not supported | Yes | Yes | Yes |
For more information, view the following blog post:
Outlook for Mac and public folder access