At Microsoft Ignite, Outlook for iOS and Android announced support for deploying managed device account setup configuration settings for Office 365 mailboxes and on-premises mailboxes leveraging hybr...
Published Jan 30, 2019
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New Outlook for iOS and Android App Config Policy Experience in Intune - Account Setup Config
@Tseeker99 - There are no plans for shared mailbox or calendar access with on-premises accounts. The ActiveSync protocol does not support this capability.
I am a bit puzzled as the OWA app was able to connect to both shared mailboxes and shared calendars. As that app has been deprecated and is no longer available, what are our options to restore that functionality or at least simulate it?