Add Exchange Server mailboxes in the new Outlook for Mac
In the new Outlook for Mac, you can add email accounts for Microsoft Exchange Server mailboxes. The new feature is unsupported and still in development. To beta test the new functionality, your environment must meet the following requirements:
The on-premises mailboxes must be in Exchange Server 2016 or a later version.
Communication between the new Outlook for Mac client and Exchange Server must use either NTLM or Basic authentication.
Note: The new Outlook for Mac doesn't support Kerberos or Certificate authentication. For more information about currently supported Exchange Server features in the new Outlook for Mac, see Supported features for Exchange on-premises.
Outlook or Office must be licensed through a volume license, or an enterprise or business Microsoft 365 subscription plan.
Outlook or Office must be downloaded from the Microsoft 365 portal (https://office.com).
Note: The Outlook and Office versions that are downloaded from the Apple App Store don't support the new functionality.
After these requirements are met, opt in to the beta channel, and then install the latest beta channel release or current channel (preview) for the Outlook for Mac client.
To add an Exchange Server mailbox in the new Outlook for Mac, see Add an email account to Outlook.
To report issues or provide feedback, select Contact Support from the Help menu in the Outlook for Mac client.