Microsoft has released Guest Access for Microsoft Teams, but Microsoft Teams guest access is a tenant-level setting and is turned off by default, so i will show you how to turn this on.
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Turn on Guest Access on tenant level Go to your Admin portal, Settings, Services and Addins and select Microsoft Teams. Or use the link below.
https://portal.office.com/adminportal/home#/Settings/ServicesAndAddIns
Invite guests to your Team go to your Team you want to share and insert the guest users email address
