Universal Containers has implemented Customer Community with Customer Community Plus licenses for its distributors.

The requirement is a many-to-many external relationship: one part-time agent can work for several distributor Accounts. Contacts to Multiple Accounts can model those relationships through Account Contact Relationships, and a Sharing Set can use the related-account relationship to grant the Experience Cloud user access to the appropriate distributor Accounts. This is substantially more scalable than maintaining Apex share rows or manual sharing rules every time an agent begins or stops working for a distributor. The user ' s access follows the underlying relationship data instead of a separate custom sharing-maintenance process. Customer Community Plus supports the richer external sharing architecture needed for this scenario. The architect should ensure the Sharing Set mapping uses the eligible Account/Contact relationship field and grants only the required access level. Study Guide reference: Access to Records - Sharing Sets, Contacts to Multiple Accounts, Account Contact Relationships, Customer Community Plus, and scalable external record sharing. The implementation should also be validated with representative users so effective permissions, sharing inheritance, and any cross-object access behave exactly as designed before production release.