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It's time for our second Ask Microsoft Anything (AMA) about updating Secure Boot certificates on your Windows devices before they expire in June of 2026. If you've already bookmarked Secure Boot play...
Heather_Poulsen
Updated Jan 29, 2026
AMA
kumarshai88hotmailco's avatar
kumarshai88hotmailco
Copper Contributor
Feb 08, 2026

About the Media Update, do we have latest ISO available with 2023 Certificates updates for Server OS like 2016, 2019, 2022 in Volume licensing portal?

Secondary how can I update the Custom build server OS iso image (that we built using WinPE and ADK) if required ?

  • mihi's avatar
    mihi
    Copper Contributor
    Feb 08, 2026

    For the second question, refer to this Knowledge Base article:

    https://support.microsoft.com/en-us/topic/updating-windows-bootable-media-to-use-the-pca2023-signed-boot-manager-d4064779-0e4e-43ac-b2ce-24f434fcfa0f