This article describes the way to access shared Exchange calendar on mobile Android or iOS devices.

The native calendar application on mobile devices doesn't have a functionality to display any Exchange calendars except owned by a user.

It is advised to download free OWA application for Android or iOS provided by Microsoft, which allows users to view shared calendars, including delegate support. 

Note: Shared folders cannot be opened in Outlook app. You will need to use OWA app instead.

Android

Important: OWA for Android is working only with mailboxes hosted on Office 365 (excludes Office 365 Personal and Office 365 Home Premium).

To access shared calendars in OWA on Android do the following:

  1. Go to OWA app > click Options button
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  2. On options page select Calendars > page open Other Calendar/ People's Calendars to access shared calendars
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iOS

Important:  Applies only to Exchange 2013 and 2016.

  1. Go to OWA app > click on Options button > select Calendar
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  2. On Calendar page open Other Calendar/ People's Calendars to access shared calendars
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For more details refer to Microsoft articles about Android and iOS applications. 

For information on sharing the Exchange folders and calendars, refer to Knowledge Base article on How Do I Share (Let Others See) My Outlook Folders (Inbox, Contacts, Calendar etc.)?