Important: The information below is based on Microsoft's recommended use of mobile devices when it comes to interacting with calendars. For best results, Microsoft recommends that people who schedule events with one another use the same calendar client. The majority of calendaring issues involve events with attendees, which may not get updated correctly if the organizer or any of the attendees take action on the meeting via a mobile device.

What can I do?

• Use/configure supported client.
• View personal or subscribed calendar data.
• Only create/modify events that you own and which do not contain any attendees. If you need to make an event which includes attendees, use Outlook on the web or Outlook (configured via Exchange) to take this action.
• If you need to view other person's calendar data, have them grant you read access to their calendar (which you can subscribe to).

What shouldn't I do?

• Do not make changes to events you are the owner of which have attendees. Use Outlook on the web or Outlook (configured via Exchange) to take this action.
• Do not take action on events which you are an attendee of. Use Outlook on the web or Outlook (configured via Exchange) to take this action.
• Do not attempt to manage another person's calendar. Use Outlook on the web or Outlook (configured via Exchange) to take this action.

Additional resources

• Best practices when using the Outlook Calendar
• Microsoft 365 - Known Issues