Best practices: Open OneDrive/SharePoint sharing but restrict Teams guest access by domain
Hi all, Since SharePoint Online and OneDrive moved fully to Microsoft Entra B2B for external sharing, we've run into a policy conflict and would like to hear how others are handling it. Our requirements Enable OneDrive and SharePoint file sharing with external users, regardless of their email domain. Restrict Microsoft Teams guest access to a predefined list of approved partner domains. Continue allowing Teams external access (federated chat and meetings) for all domains. The problem: Teams guests, SharePoint guests, and OneDrive guests are now governed by the same Microsoft Entra B2B invitation framework and the single Collaboration restrictions allow/deny list under: External Identities → External collaboration settings As a result, restricting guest invitations by domain also restricts OneDrive and SharePoint sharing for domains not on the allowlist. According to Microsoft's response in the following Q&A, this behavior is currently by design: https://learn.microsoft.com/en-us/answers/questions/5954975/onedrive-external-sharing-no-longer-working-with-a Questions to the community Has anyone implemented a solution where OneDrive/SharePoint sharing remains open to all domains while Teams guest access is restricted to approved domains only? Are there recommended approaches using Entitlement Management, Access Packages, Connected Organizations, or other Entra capabilities? Is there any roadmap item for workload-specific collaboration restrictions (e.g., separate policies for Teams guest invitations and SharePoint/OneDrive sharing)? Any real-world experience or best practices would be greatly appreciated. Thanks, BejhanJoin Merill Fernando and other guests for our Identity and Network Practitioner Webinar Series!
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How to map a user custom security attribute to OIDC id and access token ?
We are integrating keycloak with azure entra via OIDC. We have created custom security attribute to map some extension fields for the user. We tried to map these as tokens, but the custom security attributes doesn't show up in the dropdown under the token > add optional claims We then tried to define them under the Enterprise App > Single SignOn > Attributes & Claims; but unable to find these custom security attributes in the drop down there either ! Any help for this problem is deeply appreciated. Thanks, RaghavEnable MFA method
Dear, Currently in our company, the authentication methods policy > Microsoft Authenticator defaults to “any”. Either “passwordless” or “Push”. It is possible to enable the following authentication method through a conditional access policy, currently it is enabled for some users. Desired authentication method: The current method is as follows: Can it be enabled for professional accounts or is it only focused on personal accounts? Thanks in advance.
Guest accounts and MFA via Conditional Access in MS Entra
Hi experts, trying to get some help on my scenario and issue that external users started to experience since I've enabled MFA for external identities & guest users via Conditional Access. We have lots of external partners that we share some documentation with from our SharePoint. Some time ago, I have enabled "MS Entra B2B Integration for SharePoint and OneDrive" so that any external user that access shared files/folders in our SharePoint gets a GUEST account created in our tenant. This was also preparation for enabling MFA for External users via Conditional Access. I believe these are called "B2B Collaboration guests" Now, few days ago, I have enabled MFA via Conditional Access for all external users and guests, enabled for all cloud apps and require MFA to grant access. Until now, I got feedback from two external partners that their existing access doesnt work anymore - and they need to go through MFA (which is expected). The problem is that when they go through MFA set up, it ends up in a "loop" - meaning, they go through all steps but when completing the last step they are returned back to the very 1st step again. So they: scan QR code successfully authenticate get the page that it was successful get back to the 1st step asking to install or use MS Auth app The user tried different browsers also with Incognito tabs... When I am checking sing-in logs: guest account is created fine the status is: "Interrupted" additional details: The user was presented options to provide contact options so that they can do MFA. conditional access forcing MFA is marked as FAILED as MFA was not completed Both external partners that reported this are using MS Entra and I see their IDENTITY as ExternalAzureAD. Have not heard back from anyone else using other than ExternalAzureAD so not sure if there is something extra that needs to be configured. Anyone experienced this issue? Any idea what can be wrong? I do not have any cross-tenant collaboration etc configured...
Phishing resistant MFA options for Entra ID Guest users
What are the phishing resistant MFA options for Entra ID B2B guest users who authenticate from an IDP that is not configured for inbound cross tenant trust? From our testing, there does not appear to be any way to use fido2/passwordless/certificate-based authentication with the guest account on the resource tenant. The following links appear to indicate that this is not supported. https://learn.microsoft.com/en-us/entra/identity/authentication/concept-authentication-strength-advanced-options#certificate-based-authentication-advanced-options-1 https://learn.microsoft.com/en-us/entra/identity/authentication/concept-authentication-passwordless#supported-scenarios-1 When we enable MFA requirements in conditional access policy for Guest users, the only option that seems to work is MS Authenticator which the user can enroll for on our tenant. Would switching the account from a B2B guest to an internal Guest allow something like CBA to function or is the only real option to enable cross tenant trust and force the user to enable MFA on the account in their home IDP?
