I have one problem with named integration. We have a custom app which is creating a SharePoint list item from outlook calendar appointment. If you enter start and end date in calendar item manualy everything work great, but if you choose and tick "All day" option we have a problem.
Namely, the entry in outlook calendar is as it should be from 0.00-0.00 but in the SharePoint list it is shown from 02:00 till 02:00 next day. I checked all to regional and time zone settings, but I cannot find anywhere the source of the problem.
Does anyone have any kind of suggestion why that is happening ? I searched for solution, but without success. The only thing similar was some bug in SharePoint 2013, but nothing for SharePoint Online.