[Dovecot] Move of mail folders to other mail account on same server

Hi,

I'd like to move mail folders from one mail account to another mail account on the same server. Moving the folders via my mail client (Thunderbird) takes a long time. Therefore I wondered whether it's not possible to simply move the files on the server itself. If I unsubscribe to the folders in my source account, then move the folder and subscribe to the folders in my target account: will that work?

I run dovecot version 2.1.15

Thanks a lot,

Jan