Migrate maildir between servers dovecot

Hi to all, i have two servers with dovecot 2.2.15 one is actualy on production (server A) and another that i put on production soon (server B) My goal is migrate maildir from server A and server B. How can i achieve that? I read http://wiki2.dovecot.org/Migration/Dsync but i haven't understand well where to put such configuration (in which server). Thanks in advance for any help.