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Microsoft Teams Blog
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Collaborate securely with anyone in Microsoft Teams

Anne Michels's avatar
Anne Michels
Icon for Microsoft rankMicrosoft
Feb 28, 2018
We’re starting to roll out the ability to add anyone as a guest in Microsoft Teams. This means that anyone with a business or consumer email account, such as Outlook.com, Gmail.com or others, can par...
Updated Feb 28, 2018
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TonyRedmond's avatar
TonyRedmond
MVP
Feb 28, 2018

I'd go with 30 teams, one for each vendor. The chances of data leakage in SharePoint, even with private channels, is too high. Security is all about boundaries - so use the boundary that is there and don't explore what might work in the future.