Synchronisation of campaign members in salesforce and campaigns in cleverreach

Hi everyone,

we just started trying to connect Salesforce’s data bank with cleverreach. What I want to do, is synchronise contacts and or lead in salesforce in campaigns with the campaigns we have in cleverreach. It used to be very easy. Done with a button. I am a total beginner, if you can’t tell.
I really don’t understand how this works. Can any of you tell me where I can find more information on this?