[MlMt] Trouble with moving files

[Brenda Bell]

I’m still working out the kinks on my new install. On my old MacBook, 
I used to use Cmd-Opt-T to move a message to another folder. If it 
matters, it’s usually a subscribed (shared) IMAP folder.

On my new MacBook, the same sequence makes a copy… i.e., I have a copy 
in the shared folder and the original is still in the source mailbox.

I don’t recall having to do anything special to get move behavior on 
my old MacBook. What am I missing?