We use a outlook connector where we can convert e-mails to cases.

They requested to set the case origin to e-mail when they use the connector (when i check a case it has no origin set). My idea was to do this through a workflow to check where the case comes from. However, i fail to find the right filter to find this particular case. Any thoughts?

it is probably easy but after googling i only find routing for queues which is not what i need.

Thanks in advance!