How to sync your Microsoft 365 calendar with the Apple Calendar app on iPhone and Mac

Summary

This guide helps you troubleshoot and resolve: How to sync your Microsoft 365 calendar with the Apple Calendar app on iPhone and Mac. Follow the steps below to fix the issue.

Common Causes

Integrating your Microsoft 365 business calendar with the native Apple Calendar app on your iPhone or Mac allows you to manage your schedule without needing to switch between multiple applications. By using the Exchange protocol, your appointments, reminders, and meeting invites will sync in real-time across all your Apple devices.

Detailed Instructions

On iPhone and iPad (iOS)

1. Open the Settings app.
2. Scroll down and tap on Calendar (or Mail).
3. Tap Accounts, then select Add Account.
4. From the list of providers, select Microsoft Exchange.
5. Enter your full business email address and a description (e.g., "Work Email") then tap Next.
6. When prompted, select Sign In to use the Microsoft 365 modern authentication portal.
7. Enter your password and complete any Multi-Factor Authentication (MFA) prompts required by your organisation.
8. On the final screen, ensure the toggle for Calendars is switched On. You may also choose to sync Mail, Contacts, and Reminders here.
9. Tap Save in the top right corner.

On Mac (macOS)

1. Click the Apple Menu () in the top left corner and select System Settings (or System Preferences on older versions).
2. Navigate to Internet Accounts.
3. Click Add Account... and select Microsoft Exchange.
4. Enter your name and business email address, then click Sign In.
5. A Microsoft login window will appear; enter your password and complete the MFA verification.
6. In the list of apps to sync, ensure Calendars is checked.
7. Click Done.
8. Open the Calendar app from your Dock or Applications folder to verify your events are appearing.

Troubleshooting

Calendar events are not appearing

• Check Account Activation: On iOS, go to Settings > Calendar > Accounts and ensure the account is listed and the Calendars toggle is green.
• Refresh the Feed: In the Apple Calendar app, tap Calendars at the bottom of the screen and swipe down on the list to force a manual synchronisation.
• Check Default Calendar: If new appointments aren't syncing, ensure you are saving them to the Exchange calendar and not the local On My iPhone or iCloud calendar.

Authentication errors or password prompts

1. Go to Settings > Calendar > Accounts.
2. Select your Exchange account.
3. If prompted, enter your new password. If no prompt appears, delete the account and add it again following the steps above.

Syncing is slow or intermittent

• Ensure your device is not in Low Power Mode, as this can disable Push synchronisation to save battery.
• Check that you have a stable internet connection.
• Verify that you are using the latest version of iOS or macOS to ensure compatibility with Microsoft's security protocols.

If your calendar still fails to sync after following these steps, please Open a Ticket so our technical team can analyse your account configuration.

Still Having Issues?