SAP Project System (PS) integrates with external project management applications like Microsoft Project through a dedicated interface. This interface allows for the bidirectional transfer of project data, including Work Breakdown Structures (WBS), activities, dates, relationships, and resource information. The primary tool provided by SAP to facilitate this connection is "OpenPS for Microsoft Project," which acts as an add-on to the Microsoft application. The term "EPS interface" (External Project Software) is a conceptual descriptor for this type of integration, representing the gateway for data exchange with external project tools.

B. No interface to Microsoft Project is available.

This is incorrect. SAP provides the "OpenPS for Microsoft Project" add-on specifically for this purpose.

C. The catalog interface.

This is incorrect. The catalog interface (Open Catalog Interface - OCI) is used in procurement to connect SAP systems to external supplier catalogs, not for project management data.

D. you do not need and interface. You can exchange data using object link.

This is incorrect. Object linking is a function within SAP to connect different SAP business objects (e.g., a document to a WBS element), not for data exchange with external software.

1. SAP Help Portal, SAP S/4HANA 2021, Project System (PS) > Structures > Interfaces > Interface to External Project Management Software: "You can exchange data between the Project System and external project management software, such as Microsoft Project or Primavera. You can transfer the entire project structure or parts of it." This document confirms the existence and purpose of the interface.

2. SAP Help Portal, SAP S/4HANA 2021, Project System (PS) > OpenPS for Microsoft Project: "OpenPS for Microsoft Project is an add-on program that you can use to exchange data between the Project System (PS) and Microsoft Project (MSP)." This identifies the specific software component that enables the interface.