UiPath.Mail.Activities limited?


I’d like to create some library in UiPath studio to handle outlook automation.
I included the UiPath.Mail.Activities package in verion 1.20.0 and namespace
it by OL = Microsoft.Office.Interop.Outlook

I start by creating a variable of type OL.Application and asign it by olApp = new OL.Application()

Next, I create a for each loop
foreach(OL.MAPIFolder MF in OlApp.GetNamespace(“MAPI”).Folders
and in this loop, I found out
that MF.EntryID is not available - but it should be in the usual libary.
Next problem I have is, when I invoke another workflow and hand
the folder MF as an argument, an exception is thrown.

I am a bit confused, why this editor does not provide highlighting code or
adding screenshots.

Is anything known about working with this package on a coding level in UiPath?