If I'm not online on the server my links don't work, is there a way to make them work?

Editing the emc of offline players is next to impossible in a safe manner due to capabilities not working on offline players

No, this is a very intentional restriction

I'm not trying to be controversial and I apologize if the question is biased but I realy would like to know why

ohhh, it makes a lot sense but I didn't think that because we were playing with the Team ProjectE mod that shares the EMC between me and my friend