Hey Patrick,
A microflow that's used as the initial input for a scheduled event can't contain a parameter, because the application doesn't know what object to retrieve. In your case it would be best to delete your parameter, and start off with a database retrieve activity to retrieve all the emails you want to import.
Kind regards,
Cas
Hi Patrick,
This first thought is that need to convert your microflow parameter to a retrieve from database for the EmailAccount, if you have some query on what is the EmailAccount or multi EmailAccount s.