Apply preventive endpoint controls across managed devices with Microsoft Defender for Endpoint P1. The service combines malware protection with attack surface reduction measures intended to limit common routes into an endpoint. Web protection policies help control access to malicious or unwanted destinations, while device control can govern the use of removable storage and peripheral devices under defined security policies. Defender for Endpoint P1 fits environments that need a centralized endpoint-protection layer across their Microsoft security operations. Security administrators can use its protection capabilities to standardize endpoint policies, reduce exposure to known threats, and enforce controls that are difficult to maintain consistently through local device settings. It is suited to organizations protecting user workstations and other managed endpoints where preventive controls are the primary requirement. Part number 83FDE749-6EA3-4B7F-ADC0-9537C49CE2F0 corresponds to the Defender for Endpoint P1 offering. Within the Defender for Endpoint family, Plan 1 concentrates on foundational prevention controls: malware protection, attack surface reduction, web protection, and device control. This focus distinguishes it from service tiers centered on advanced detection, investigation, and response workflows. Select this subscription when endpoint protection policy enforcement and threat prevention are the core operational needs.