When you subscribe to an Online Service through a Microsoft Volume Licensing program, the terms and conditions for service usage are outlined in several key documents:

Volume Licensing Online Services Terms (OST) Document: This document specifies the terms and conditions for using the online service. It is updated quarterly to ensure it reflects the latest policies and guidelines. Both current and archived editions of the OST are available for download, providing you with access to the most up-to-date information as well as historical data for reference.
Product List Document: This document provides a comprehensive list of all online services available through the Volume Licensing program, along with their specific licensing terms. It serves as a valuable resource for understanding the scope and limitations of your service subscriptions.
Program Agreement: This agreement details the overarching terms and conditions of the Volume Licensing program itself, including your rights and responsibilities as a subscriber. It is essential for ensuring compliance and understanding the full extent of your licensing arrangement.
By regularly consulting these documents, you can ensure that you are fully informed about the terms and conditions governing your online service subscriptions. This proactive approach helps you maximize the value of your investment in Microsoft services and ensures that you remain compliant with all licensing requirements.