Sharing your Copilot notebooks - Is being rolled out

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Microsoft is rolling a new update to Copilot Notebooks that make collaboration even easier: the ability to share Copilot Notebooks with your colleagues.  Personally, I like Notebooks because they feel almost like small, personal agents I don’t have to configure. They give me a safe space to collect notes and documents and then work on them over time. With this update, that personal space can become a shared space for a selected group of  colleagues, without compromising security or permissions. I think it is also important to note that your chat and chat history within the Notebook stays private. The web rollout began in late October and will finish by December, while mobile access starts in early November and are related to the Microsoft 365 Roadmap ( ID 506851 )  You can also read more about the Copilot Notebooks experience on the Microsoft website here . If you like this update and want to stay informed about similar improvements, feel free to follow me on LinkedIn!

External Sharing in SharePoint and OneDrive is changing: What You Need to Know

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In an ongoing effort to create a more secure environment by default, Microsoft is introducing an important security update that will affect how external users access content shared through SharePoint and OneDrive. Starting July 1, 2025, any links shared with external users before your organization enabled Microsoft Entra B2B integration will no longer work.

This change applies to all organizations that have already enabled or will enable SharePoint and OneDrive integration with Microsoft Entra B2B (Most organizations I have looked into so far). External users trying to use old links will see an error message saying the organization has updated its guest access settings. To regain access, the content must be reshared.

Highlights of how the change affects organizations who have enabled B2B:

  • All external sharing will require guest registration. External users must be added as guests in your Microsoft Entra directory.
  • Access will be managed through Microsoft Entra B2B Invitation Manager. This provides better tracking, lifecycle management, and control over guest access.
  • Multi-factor authentication (MFA) may be required. If your organization enforces MFA for guests, they will need to complete MFA before accessing shared content.
  • New sharing links will only work for registered guests. Anonymous access will no longer be supported in this model.

This means that external collaboration becomes more secure and auditable, but also requires a bit more setup and communication with your external partners. This change may have an impact on how you govern guest lifecycle management, from invitation to deactivation. Also verify your conditional access requirements for guests.

This update is a smart move by Microsoft to bring more control and visibility to external collaboration. While it may cause some short-term inconvenience, it’s a good opportunity to review and improve your sharing practices.