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...

Issue with enable-csuer when the user first name contain spaces

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I have run into an issue with the set-csuser command in a few deployments. The error occurs when I try to use set-csuser with the "-sipaddresstype firstlastname" switch.


If I changed the -sipaddresstype from "firstlastname" to "emailaddress", I was able to use the script to enable the same user.

It turned out this user had two first names (with a space between) in the fname property in AD (fname="First Name"). If I removed one of them (fname="First"), or used a hyphen between them (fname="First-Name"), the script started working again.