satyayakkalaCopper ContributorAug 02, 2021Teams Chat issue 02-08-2021 Hi Team, We are using teams in my organization. we have two different tenants with different domains. when users in domain A or B domain adding other domain user in the existing group chat, it is c...Show More
ChristianJBergstromMVPAug 02, 2021Hello, have you set up federation/external access? https://docs.microsoft.com/en-us/microsoftteams/communicate-with-users-from-other-organizations#compare-external-and-guest-access Manage external access (federation) - Microsoft Teams | Microsoft Docs
