Appointment in my iOS calendar always appears one hour ealier in my Outlook 365 calandar

Just purchased and installed Office 365 on Monday. One of the last issues to work out is a problem I am having getting events in the iOS calendar properly synchronized with the Outlook 365 Calendar.

Simply, any event I enter in iOS calendar appears one hour earlier in my Outlook 365 calendar.

Strangely, an event entered in my Outlook 365 Calendar shows up in the correct time on my iPhone.

Furthermore, if I log on to iCloud and enter an event there, the event time syncs perfectly with Outlook 365. Given that ICloud and Outlook 365 mesh perfectly, I suspect the issue is on my iPhone.

I have checked and rechecked all my time zone settings and made sure that daylight savings time is turned off on my iPhone XS Max, My Windows 10 Pro PC, My Routers, Access Points, etc. I have even tried to see if switching between WiFi and LTE makes a difference (it does not)

How do I resolve this problem?

Thanks in advance.

For reference. My iPhone is on IOS 12.3.1

My PC is on Windows 10 Pro Version 1809

Office 365 is two days old - can't find version number.