Your SharePoint Sharing Might Break in 2026

A major change is coming and it’s not getting enough attention.

Microsoft is moving away from simple OTP sharing and shifting to full Entra B2B. It sounds like a security upgrade, but it completely changes how external access works.

This isn’t a small tweak:

Existing sharing links may stop working as expected

External users will go through new authentication flows

Access will rely heavily on identity and guest policies

Yes, you get better control and visibility but also more friction if your setup isn’t ready.

If your organization relies on quick sharing links, this could become a real issue fast.

Curious how others are handling this:

Are you already using Entra B2B?

Seeing any access or adoption issues?

How are you balancing security vs usability?