My Outlook calendar on my iphone keeps on displaying someone else's schedule

If the other person’s schedule is appearing only in Outlook on the iPhone, the most likely causes are that a shared calendar was added in mobile, the wrong calendar is selected, or the account needs to be refreshed in the app.

Try these steps in order:

1. In Outlook on the iPhone, open Calendar and tap the calendar icon or your avatar in the upper-left corner.
   • Check which calendars are listed.
   • Make sure only the calendars that should be shown are checked.
   • If the other person’s calendar appears there, remove it from view.
2. If it is a shared calendar, note that shared calendars show in mobile only when they were accepted from supported Outlook clients such as Outlook on the web, iOS, Android, or Windows 10 Calendar. If a shared calendar was added or accepted recently, it can appear in the mobile app.
3. If the calendar should not be there, ask the calendar owner to re-share the calendar only if needed, or remove the shared calendar from the app if it was added by mistake.
4. Refresh the Outlook account in the app:
   • Go to Outlook app > Settings > Accounts > select the account.
   • Confirm the account is not a POP or IMAP account, because those do not support calendar sync.
   • Tap Reset Account and then check whether the calendar display is corrected.
5. If that does not help, remove and re-add the account:
   • Go to Settings in Outlook > tap the affected account > Delete Account > Delete From This Device.
   • Then add the account again.
6. If the issue continues, test the same account on another mobile device. If the extra schedule appears only on that iPhone, the problem is likely device-specific or app-specific.

• Why does my shared calendar not show up in mobile? | Microsoft Support
• [Outlook app](https://support.microsoft.com/outlook/can-t-sync-calendar-and-contacts-with-my-phone-or-tablet)
• My calendar on Iphone outlook 365, when i put in a appointment, yearly repeated, it shows up exact 1 month later, on my desktop it is correct - Microsoft Q&A