# Endpoint Exfiltration Prevention Nightfall supports exfiltration prevention in endpoint devices. The exfiltration prevention in endpoint devices prevents your organization's employees from exfiltrating data out of your organization. This feature is available for devices running on the macOS and Windows OS. To monitor each device for exfiltration, you must first install the Nightfall agent on the devices that require monitoring. You can install the Nightfall agent either manually on each device. Alternatively, you can also use an MDM to install the agent. Once you install the Nightfall agent, you must create policies to start the monitoring. Nightfall monitors the devices as per the policy rules set. You can learn about how to install the Nightfall AI agent for macOS/Windows OS and the process to create policies from the following links. * [Install Nightfall AI Agent for MAC OS](/data-exfiltration-prevention/exfiltration_endpoint/installation_mac.md) * [Install Nightfall AI Agent for Windows OS](/data-exfiltration-prevention/exfiltration_endpoint/install-nightfall-ai-agent-for-windows-os.md) * [Configuring Policies](/data-exfiltration-prevention/exfiltration_endpoint/policies.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.nightfall.ai/data-exfiltration-prevention/exfiltration_endpoint/endpoint-exfiltration-prevention.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.