Microsoft Exchange features in Apple devices
The following are features of iOS, iPadOS, and macOS when integrating with Microsoft Exchange Server.
Modern Authentication support for Exchange accounts
iOS 11 or later and macOS 10.14 or later support Microsoft Modern Authentication workflows of Exchange online tenants. OAuth can be used for Office 365 accounts with Modern Authentication enabled. In iOS 12 or later and macOS 10.14 or later, configuration can also be performed manually or with a configuration profile.
See the two Microsoft Support articles Using Office 365 modern authentication with Office clients and Enable or disable modern authentication in Exchange Online.
Note: You can use multifactor authentication on an Exchange account that you set up manually on an iPhone or iPad, but not on an account that is set up using an MDM solution.
Exchange Active Sync (EAS) and Exchange Web Services (EWS) both support the following features of Exchange on iOS, iPadOS, and macOS:
Wirelessly creating and accepting calendar invitations
Viewing an invitee’s calendar free/busy information
Creating private calendar events
Configuring custom repeating events
Showing the week numbers (which week of the 52 weeks in a year)
Receiving calendar updates
Keeping tasks in the Reminders app up-to-date
Calendar attachments and structured location support
Calendar in iOS and iPadOS allow Exchange (2010 or later) event invitations to be forwarded and allows an event recipient to suggest different times and locations. Calendar also supports smart locations and suggestions to the user based on their location and the event participants.
Microsoft Exchange Autodiscovery
iOS, iPadOS, and macOS support the Autodiscover service of Exchange. When a user manually configures an Apple device, Autodiscover uses the user’s email address and password to determine the correct Exchange Server information. See Autodiscover Service on the Microsoft website.