Kolab user "A" gets an email which includes a calender invitation (.ics file) for him/her. User "A" forwards the email to Kolab user "B". User "B" expects to see a calender placeholder event generated automatically in the calender by wallace, just like happens for other meeting invitation emails user "B" gets directly, but this doesn't seem to work, as user "B" is not included in the original invitation attachment (.ics) recipient field, and wallace seems to skip processing these forwarded invitation emails.
pykolab / wallace log entry:
"2020-04-27 09:44:23,949 pykolab.wallace/invitationpolicy INFO  tmprfv0t_ No user attendee matching envelope recipient email@example.com, skip message"
It'd be nice if wallace processed properly also forwarded calender invition emails.