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External Access - What can external users do?
Dear community, I just got external access working with both test tenants that my organization has. However, I want to clarify some things about what external access opens up for other users from...
Sylvester- I think it really depends on HOW the other Federated domains have their configuration set.
The first link doesn't exactly mention IF the External participants can see your e-mail. However, If they already have it then they would be able to send a Chat request or add you as a Contact. I suppose a malicious user in a Federated Domain could spray your users if they had a list of e-mails but that is very low chance if the Federated domain is trustworthy.
I did find another article at the very bottom of the first doc that tries to explain External versus Guest.
Lots of good information here https://docs.microsoft.com/en-us/microsoftteams/manage-external-access HERE https://techcommunity.microsoft.com/t5/healthcare-and-life-sciences/getting-started-with-microsoft-teams-guest-access-answers-to-top/ba-p/683930 AND Here https://docs.microsoft.com/en-us/microsoftteams/guest-experience