Outlook 365 Calendar Iphone. Kindly follow through the steps below: Chances are that you keep two different types of calendars.

Disable low power mode and allow cellular data. Open the proton mail app and go to settings → [your account name] → account settings → undo send.
Tap On Passwords &Amp; Accounts.
Here's how to do that, including using the outlook app for iphone.
Download Microsoft Outlook For Iphone.
Download outlook for ios from the ios app store and then open it.
0, 5, 10, Or 20.
Images References :
Need To Sync Your Outlook Calendar With Your Iphone?
Release the buttons and let your iphone restart.
Tap Calendars At The Bottom.
Syncing your iphone calendar with outlook will allow you to view and manage your calendar events from both your phone and your computer.
Do One Of The Following: