My daughter and I have played only a few games overall, so we're still learning a few of the more uncommon rules. We just had our first game today with veers and Leia. Anyway, we had a question about her card. During the game one of my units(speeder bikes) was in line of site and at proper range. She only attacked it once, because of how we interpreted the card. But could she have attacked my speeder bikes three times? Or (and this is the way we played it) does it just mean she can attack up to 3 eligible units only once each?

Card reads "At the end of Leia Organa's activation, she may perform up to 3 attacks against different enemy units using the following weapon."

You played it correctly. She can attack three times but it needs to be a different unit every time. All units need to be eligible targets, that means 4+ range and in line of sight.

So if there are only 2 eligible units for an attack, Leia can only attack twice.

OK cool. Thanks, I thought we had, but wanted to double check.