Question
Where to configure e-mail forwarding of a non-active Kopano account?
Situation
You are using non-active Kopano accounts as group accounts and forward incoming e-mails to the members of that group.
Answer
To configure the forwarding of a non-active Kopano account you must active it in order to do so. When done you just deactivate afterwards.
In order to change the forwarding configuration you must first reactive the account during that task.