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May I know is it possible to look up another azure AD tenant users by teams when we create Azure AD B2B direct connect and teams federation between each tenant.
It seems I can't ,
but if this realize then it will be very convenient for each tenant users to have a communication between across tenant.
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Just checking in to see if the below answer helped. If this answers your query, please don’t forget to click "Accept the answer" and Up-Vote for the same, which might be beneficial to other community members reading this thread.
Azure Active Directory (Azure AD) B2B direct connect is a feature of External Identities that lets you set up a mutual trust relationship with another Azure AD organization for seamless collaboration. This feature currently works with Microsoft Teams shared channels. With B2B direct connect, users from both organizations can work together using their home credentials and a shared channel in Teams, without having to be added to each other’s organizations as guests. Use B2B direct connect to share resources with external Azure AD organizations. Or use it to share resources across multiple Azure AD tenants within your own organization.
Currently, B2B direct connect capabilities work with Teams shared channels.
Reference article: https://learn.microsoft.com/en-us/azure/active-directory/external-identities/b2b-direct-connect-overview
To answer your question, it is possible to look up another azure AD tenant users by teams.
You can refer article https://learn.microsoft.com/en-us/microsoftteams/communicate-with-users-from-other-organizations to achieve this.
Please "Accept the answer" if the information helped you. This will help us and others in the community as well.