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...

EWS in Exchange online is about to be retired

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In 2018, Microsoft announced the discontinuation of feature updates to Exchange Web Services (EWS) in Exchange Online, urging developers to transition to Microsoft Graph. Now, Microsoft has announced that starting October 1, 2026, EWS requests from non-Microsoft applications to Exchange Online will be blocked.

This is a significant change that emphasizes the need for IT departments to take action. It's crucial to start mapping existing tools, scripts, or integrations that rely on EWS and plan for their transition.

There's no direct way to opt out of this change. The change only applies to Microsoft 365 and Exchange Online. EWS in Exchange Server will not be affected.