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. T...

Ignite session trailer

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Here is a trailer for my Microsoft Ignite session: "Managing Backup and Restore in Skype for Business".

We have been asked to create these trailers to clarify and elaborate on what to expect of our sessions, to make it easier for attendees to decide whether or not this session is something for them.


If you're going to Ignite, and worried your Lync or Skype for Business deployment isn't prepared for a disaster. Join me in Chicago for a deep-dive into backup and restore.