The Exclusion activity allows you to exclude elements from one population according to certain criteria.
The Exclusion activity is used essentially to carry out additional filtering on inbound transition populations.
A primary set is defined amongst inbound transitions. Members of other inbound transitions are excluded from the primary set. The outbound transition of the exclusion activity only contains the members of the primary set that were not encountered in the other inbound transitions.
Select the Primary set from the inbound transitions. This is the set from which elements are excluded. The other sets match elements before being excluded from the primary set.
The inbound transitions have to contain the same type of population. For example, if the primary set contains test profiles, the other transitions have to also contain test profiles.
The following example shows two query activities configured to filter profiles from the Adobe Campaign database who are between 18 and 27 years old and have an invalid email address. The profiles with invalid email addresses are then excluded from the first set. This allows you to then send an email for example.