Guest Access in Yammer using Azure AD B2B is now in preview!

Published Dec 15 2020 08:23 AM 6,974 Views

External Collaboration is a key ingredient for the success of any organization. At Microsoft, we recognize the need to seamlessly connect and engage with key stakeholders and partners outside of your company and today, we are excited to announce the preview of Azure AD business-to-business (B2B) guest support in Yammer.   


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How can you enable the Azure AD B2B guest functionality in your Yammer network 


If your Yammer network is provisioned after December 15th, 2020 then Azure AD B2B guest functionality is already enabled by default for you. Community admins in your Yammer network can add guests to the communities in your network.  

The functionality will be rolling out to existing Yammer networks in Native mode over the next couple of weeks and disabled by default. Yammer network admins needs to enable guest access on their networks from Yammer admin center > Security Settings > External messaging settings.   


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Note: Yammer network should be aligned to Native Mode to enable Azure AD B2B guest functionality.  


What’s new in Yammer with Azure AD B2B guest framework?  


When it comes to external collaboration, administrators need to strike a perfect balance between empowering employees to invites guests from outside the organization to foster collaboration and put in place necessary guardrails to make sure guests can access only authorized resources.  
Governance and compliance capabilities are at the heart of the new guest support in Yammer. Azure AD B2B guest framework provides a secure, compliant external collaboration framework used by many apps in Microsoft 365 suite such as Microsoft Teams and Microsoft SharePoint, and now it’s coming to Yammer. 


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Azure AD B2B guest support in Yammer brings the following capabilities:  

  • Robust policies for guest invitations and providing access give administrators full control over who can invite guests, which organizations guests can be invited from, and which communities they can be invited to. 
  • Simplification of guest modes in Yammer with community level guests. A guest can be added to any specific Yammer community based on the admin policy instead of the entire network.
  • Easy and compliant external collaboration (within Europe networks) for Yammer networks with data based in the EU geo.
  • Parity between participation in Yammer communities across all Yammer experiences (web, mobile (Android / iOS). 
  • Guests access to community resources like files stored in SharePoint.  
  • Ability to review guest membership and block unauthorized guest access through Azure AD access reviews and track the guest lifecycle through Azure AD audit logs. 

During the preview phase, some features are not yet available. We are working hard to bring all Yammer functionality to the new B2B guests in Yammer. Please see this article for a complete list of features that are not yet supported.  


We are excited to have you preview the functionality. Reach out to us at ‘’ for any feedback on the feature.  



Business-to-business (B2B) Guest support in Yammer Preview - Customer Terms and FAQ - Yammer | Micro... 

Microsoft 365 guest sharing settings reference | Microsoft Docs 

Senior Member

Yammer is designed for collaboration - and making it easier for guests, such as business partners, to join communities enriches conversations. So this exciting and I encourage community admins to enable. 

Occasional Contributor

I am supporting a large UK company with a Yammer deployment. We are looking for insights and lessons learned, on both moving to native mode and use of the Azure B2B guest capability (especially for large user numbers like company mergers).  If anyone can share any insights please do reach out to me at richardmgera at outlook dot com.  Even a 30 minute call would be invaluable to us! Cheers.

Occasional Visitor


Senior Member

We lost the ability to add Guests to Communities after migrating to Native Mode early this month (March 2021).  I've gone up and down the settings and can't seem to get outside guests to works.  I do have the users in Azure AD from before Native mode but there is no clear way to assign them "Yammer Communites access" roles.  What am I missing? 

Occasional Contributor



Also posted the question on the Yammer techcommunity. What is the relationship with the limitations listed on the page from 2019 Data residency? Does this mean that these limitations are lifted? Or are we talking about something else?


--- Text from 2019: Data residency - Yammer | Microsoft Docs

  • All external collaboration features:

    • Only users in your Office 365 tenant can participate in your Yammer Enterprise network.

    • External guests can’t participate in your Yammer Enterprise network.

    • Your users can’t participate in other Yammer networks, including external networks.

    • Your users can't be participants in external messaging threads, or add external participants to threads in your Yammer Enterprise network.

    • External groups can't be created in your Yammer Enterprise network, and your users can't participate in external groups belonging to other networks.

  • Posting to Yammer by sending an email message is only available for Microsoft 365 connected groups

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Last update:
‎Dec 15 2020 08:39 AM
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