Organizing your distribution lists in Association Anywhere is key for the integration to pull in the right information. Here's how you verify that setting on a distribution list.
In Association Anywhere, open the Distribution List that you are not seeing in Informz.
Check that the category/subcategory is set to External System/Informz.
Run a test of the list in Association Anywhere, using the subcategory Informz. These are the individuals that will be in the Informz target group.
Once you have the correct category/subcategory selected, your sync is ready to go!