USB device control policies for regulated clients

Overview

USB removable media is a common data exfiltration and malware vector. Regulated clients often require deny-by-default with narrow exceptions.

Policy design

1. Classify devices: approved encrypted corporate USB, blocked, read-only, temporarily allowed with ticket.
2. Use Intune Device Control or Defender Device Control policies with VID/PID or device instance ID where practical.
3. Pair technical controls with DLP policies for sensitive labels if data must leave via approved channels only.

Rollout phases

1. Audit removable media usage for 30 days (event collection via Defender or dedicated tooling).
2. Tier exceptions: executives, developers, labs—each with documented risk acceptance.
3. Enforce Block for mass storage by default; allowlist printers, smart card readers, and headsets explicitly.

Evidence for auditors

Maintain: policy screenshots, exception register, quarterly access review sign-off, and mapping to control framework (e.g., CIS, HIPAA).

User support

Publish a short internal article: how to request a temporary exception, turnaround SLA, and supported alternatives (approved file transfer, Teams).

Pitfalls

Overly broad “allow all removable disk” troubleshooting exemptions—time-box troubleshooting exceptions with auto-expiry when supported.