Secure Boot certificates are being updated ahead of their 2026 expiration to maintain trust at the firmware level. This post explains why the change is necessary, what it means for boot-level security, and how administrators can successfully deploy and verify the new certificates—particularly across large environments. Contents: What Is Secure Boot? What is changing in June 2026? Consumers and Home Users Organizations and Enterprises Intune - Error 65000 Working with the Regi