Also, you should no longer experience the Microsoft Calendar not showing events problem.
Your events from the account should now appear in the Microsoft Calendar app. Step 8: Afterward, click the Save icon to save the sync settings. Step 6: Toggle off the Calendar option and toggle it back on. Step 5: On the new window, tap 'Change mailbox sync settings' option. Step 4: Select the account whose events are missing or are not syncing properly to your Microsoft Calendar. Step 2: Tap the gear icon at the bottom-left corner of the app to open the Calendar Settings menu. Step 1: Launch the Calendar app on your computer. If you are having issues finding events from a third-party calendar account in the Microsoft Calendar app, disabling and re-enabling the sync settings of the Calendar app (and account) has proven to be an effective fix.