- Check the time and date settings of your Outlook app.
- Ensure that the time zone, clock, and calendar are set correctly.
- Disable any third-party apps that may interfere with Outlook.
- Check to see if you have any auto-reply rules enabled.
- Change your app password.
- Check your antivirus software to see if your security settings are blocking a connection.
- Update your Office 365 or Exchange version.
- If all else fails, contact your IT administrator.