So is it not doing this now?
A drop down list is a ComboBox in Access forms by definition. Make sure you're using the correct terminology also to get the best response. You could theoretically be speaking of a list box or maybe something else.
When you build a combo box, you can tell it what to show and what to store and where to store it. It stores one value even if it shows multiple. So if the ID is the first field in the query building the list, then it's storing that. If the name is the first field, it's storing that unless you specify otherwise.
"But thanks be to God, which giveth us the victory through our Lord Jesus Christ." 1 Corinthians 15:57