Hello @KaileyMcCourt , Assuming the "Marketing ID" is your own
identifier and as these are new they won't have UUID or MID associated
with them. You can still upload them into AAM via offline file ingestion
and qualify traits but they won't be available in reports. These IDs can
be stored in AAM prior to the ID sync and once these IDs are synced in
AAM, you will start seeing data in your segments. You would need
onboarded traits, cross-device datasource and offline files. I hope this
gives some ...