Using Outlook for iOS for personal email and calendar management
Hi,
May I ask which iOS version your iPhone is currently running? If possible, please make sure your device is updated to the latest iOS version.
If your iPhone is already up to date, please try restarting it to help clear any temporary app-related issues.
If the issue persists, please check whether your Wi-Fi or mobile data connection is stable.
If your connection is working properly, you can try offloading the app.
If that does not resolve the issue, please delete or uninstall the app, restart your iPhone, and then reinstall the app.
If you need additional assistance, please let me know. I look forward to your response.
Stay Safe!