Forum Discussion

Copper Contributor

May 23, 2018

Solved

Block users from becoming Guest in another Office 365 Tenant

Hi! Is it possible to restrict our Azure/Office 365 users from using their account/email-addresses as Guests in another Azure/Office 365 Tenant. I know that we can block which domains that we can se...

Azure AD B2B

Peter Stapf
Jun 30, 2022
This feature is in preview now.
Have a look at cross tenant access policies:

https://docs.microsoft.com/en-us/azure/active-directory/external-identities/cross-tenant-access-overview

tpicorps

Copper Contributor

Jun 29, 2022

Please upvote this recommendation. This feature is still not available after all these years... Uservoice was taken away so it probably lost all its traction.

https://feedbackportal.microsoft.com/feedback/idea/784eb507-eef7-ec11-a81b-000d3a03dba2

Peter Stapf

Brass Contributor

Jun 30, 2022

This feature is in preview now.

Have a look at cross tenant access policies:

https://docs.microsoft.com/en-us/azure/active-directory/external-identities/cross-tenant-access-overview

StevenC365
MVP
Jun 30, 2022
As Peter Stapf points out, this is now trivial to do using Cross Tenant Access Policies.
- tpicorps
  Copper Contributor
  Jun 30, 2022
  Interesting, thanks for the info... Microsoft support told me this was not possible in any way just two days ago. Has anyone deployed this - will it even prevent the guest invitations from being sent in the first place? The issue we are having is that there is someone sending Teams guest invites to one of our users with malicious content, and the user is getting spammed with emails and Teams notifications every time one comes through.