The Education Data Architecture (EDA) provides a feature to track and manage multiple addresses for contacts and accounts using the Address object1. The Address object has a field called "Inactive" that indicates whether the address is currently in use or not2. By selecting the "Inactive" checkbox on the Address record, the consultant can mark the address as inactive and have it sync to the contact record. The contact record will then show the inactive address in the Mailing Address field, with a strike-through line to indicate that it is no longer valid3.
Setting the inactive address on the contact record through integration is not a recommended solution, as it would bypass the EDA address management feature and create inconsistency between the contact and address records. Developing a custom trigger to update the contact record is also not necessary, as EDA already provides a built-in mechanism to handle inactive addresses using the Address object.
Reference:
1: Understand Addresses in EDA - Salesforce
2: EDA Object Reference - Salesforce
3: Manage Simple Changes to Address Records - Salesforce