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...

Webinar features coming to Microsoft Teams, and what you need to know as an admin

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There have been a couple of posts regarding the webinar feature coming to Microsoft Teams in the Admin center. The Registration feature is the first feature to land, and it will be default on for all. However there are certain things an admin should know about the feature, and how to control it.

Although the feature is on by default for all, the registration page will only be available for internal users of the same tenant. If a user should need to inviter users from outside the organization, a admin have to delegate a policy allowing this action.

The feature can be controlled with the new- or set-csteamsmeetingpolicy as described here. Use the AllowMeetingRegistration or/and WhoCanRegister parameter as documented.