By starting a discussion some email meta data should be transferred

Similar to forwarding a mail, some metadata should also be sent when creating a discussion in Assistify:

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From: Hans Müller
Date: Wednesday, 11 September 2019 13:39
To: Hans Wurst
Subject: Assitify on UIC Event?

Start by locating the Outlook plugin flow that creates an Assistify discussion and compare it with the existing mail-forwarding behavior. Use the metadata example in the issue as the expected result; done means the relevant sender, date, recipients, and subject information is transferred when a discussion starts.

Written by the indexing model from the issue text.