The Enterprise Learner Record Repository (ELRR) is one of three Enterprise Digital Learning Modernization (EDLM) lines of effort supported by the ADL Initiative. Today, learner records for Department of Defense (DoD) personnel are stored in disparate locations, along with inconsistent data formats, which complicates the transport, management, and governance of the learner records across and within DoD organizations. The goal of the ELRR is to aggregate learner records across multiple systems and organizations to provide a centralized location for DoD personnel to view and interact with their learning and development data. The aim of this document is to provide: a summary overview of the ELRR Prototype's initial implementation; guidance on the required interfaces between the ELRR Prototype and the ADL Total Learning Architecture (TLA) reference implementation in an Amazon Web Services (AWS) sandbox environment; a corresponding integration approach; and a stakeholder engagement strategy to support a reference implementation of the ELRR Prototype.