MC1288264
Stay informedMajor changeAdmin impact
Ask Microsoft Anything about Secure Boot certificate updates
Microsoft 365 Message Center Archive by Merill Fernando · Microsoft may not have sent this notice to your tenant.What the notice says
Microsoft’s text, with source markup removedMicrosoft is hosting two upcoming Ask Microsoft Anything (AMA) events focused on updating Secure Boot certificate updates across your Windows estate before certificate expirations begin in June 2026. These AMAs are designed to help you get clarity on what’s changing and how to plan for deployment across your environment. Bring your questions and get practical guidance directly from Microsoft experts. When will this happen: Secure Boot certificates on Windows devices begin expiring in June 2026. The upcoming AMAs will take place on April 23, 2026 and May 18, 2026. What you need to do to prepare: Review the Secure Boot playbook to understand requirements, affected scenarios, and available tooling, then add one or both upcoming AMAs to your calendar: Secure Boot AMA – April 23, 2026, 8:00 AM PDT Secure Boot AMA – May 18, 2026, 8:00 AM PDT Post your questions in the comments section of each page early and often. If you don’t see the ability to post a comment, make sure you are signed in to the Microsoft Tech Community. Additional information: For continued guidance and updates, bookmark the Secure Boot playbook and https://aka.ms/GetSecureBoot.
What changed
Between archive captures, newest firstThe archive supplies one version of this notice.
Linked documentation
Microsoft pages the notice links toThe notice links to no Microsoft Learn or Support page that this installation reads.
Related public evidence
No related evidence found in this installation's recent collection. This does not establish that no announcement exists.
Not confirmed here
What this page cannot tell you- Whether your tenant is affected: this is Microsoft's notice, not a check of your settings.