Secure Boot certificate expiration: What Windows IT admins need to know now

Secure Boot protects Windows systems by validating firmware and boot components using trusted certificates. Microsoft-issued certificates used in Secure Boot are expiring in 2026. In the coming months, Microsoft will be rolling out updated Secure Boot certificates needed to ensure a secure startup environment of Windows. IT-managed environments must take action to ensure their systems remain secure and serviceable. This post outlines what enterprise IT admins need to know and do. 

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Power Platform – Data masking service updates

We are enhancing the Data masking service to allow administrators to view masked fields via the client and enable auditors to see who accessed and read sensitive fields with unmasked values. These updates will be rolled out globally from August 8, 2025, through September 5, 2025.

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Power Apps – Manage public system views with security role

We are announcing the ability to manage access to public system views using security roles in Power Apps. This feature reached general availability on August 15, 2025.

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Microsoft Copilot (Microsoft 365): Reference a Loop or Page when creating a presentation with Copilot

You can now reference a Loop or Page when you create a presentation with Copilot within the PowerPoint application.

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Microsoft Teams: New Organization chart in the Profile Card for Web and Desktop

With the new org chart users will not only be able to contextaulize a person, they will also be able to scroll through visited profiles, see a manager’s reports counts, and more.

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Microsoft Copilot (Microsoft 365): [Copilot Chat] Launch the full Microsoft 365 Copilot app when using Copilot Chat in the Microsoft 365 apps

When using the Copilot Chat side pane in Microsoft 365 apps, users will be able to launch the full Microsoft 365 Copilot app from a dedicated button. Additionally, accessing some features in the side pane will launch the full app.

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Microsoft Copilot (Microsoft 365): Reference a Loop or Page when creating a presentation with Copilot

You can now reference a Loop or Page when you create a presentation with Copilot within the PowerPoint application.

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Microsoft Purview compliance portal: Endpoint Data Loss Prevention – Endpoint DLP support classification of Azure RMS protected Office documents

Endpoint DLP can now classify Office files stored in Windows devices that have Azure RMS protection applied. Classification will be triggered when file is used in applications or when just-in-time classification is enabled

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Dynamics 365 Customer Service & Dynamics 365 Contact Center – Set up microphone connection on representative sign-in

We are announcing the ability to enable service representative’s microphones to be connected prior to calls beginning in Dynamics 365 Contact Center. This feature is currently available in preview.

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Outlook: External tag in profile cards

Outlook will add a visual indicator on profile cards to identify external email participants, enhancing security and reducing accidental data sharing. This feature, enabled by default, will roll out worldwide from mid to late September 2025. No preparation is needed, but user communication is recommended.

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I've been working with Microsoft Technologies over the last ten years, mainly focused on creating collaboration and productivity solutions that drive the adoption of Microsoft Modern Workplace.