In thunderbird there is an archive button that allows moving a message/thread to a specified archive folder. This behavior is similar to Gmail one.

How can I accomplish the same in KMail?

Here there are some cumbersome instructions, isn't there an easier way?

http://dissociatedpress.net/add-an-arch ... -in-kmail/
https://superuser.com/questions/75592/h ... s-in-kmail

The KMail manual talks about Settings > Configure Folder Archive Agent... which I cannot find in the Settings menu.