Send Calendar Invitation from App: Outlook desktop shows time in UTC despite local timezone

[Finnair]

I have a Send button code in Powerapps app (app modified from Meeting Capture App) for a calendar invitation:

Office365Outlook.V4CalendarPostItem(MyCalendarID; FollowUpSubject.Text; FollowUpStart; FollowUpEnd; "UTC+3";{importance:"Normal"; body:FollowUpMessage.Text; showAs:"busy"; requiredAttendees:requiredAttendees});;

The Invitation goes fine to Outlook Desktop calendar week view, but when the event is opened from t here, the time is -3 hrs to the correct local zone. So when I open the event from the week view, in the event window's bottom it says time wrong with "Universal Time..." suffix.

When I open the calendar event from Outlook Web's week view, the time is correct. 

My date picker in powerapps is in Local mode.

-How should i mark timezone correctly in Send Button Code? By default it's like this: "UTC". "UTC+03.00" doesn't work.

-How to correct the fault in Outlook Desktop?

[gabibalaban · Accepted solution]

@Finnair ,

Here is a list of time zones, you can use either Windows 10Time Zone or Name of the Time Zone as Time Zone attribute in Office365Outlook.V4CalendarPostItem() function.

Hope it helps !

[Finnair]

@gabibalaban  Thanks!

Amazing, it works! ("FLE Standard Time") 

It corrects the wrong time stamp in the calendar event's details window.