Hi AlisonCook,
You can log in Microsoft Teams Admin Center by this link: https://admin.teams.microsoft.com/teams/manage.
You can turn on “User can communicate with other Skype for Business and Teams users” to enable external access as the following image.
By default, external access is turned on in Teams, which means that your organization can communicate with all external domains. For more details, please refer to this link: https://learn.microsoft.com/en-us/microsoftteams/manage-external-access.
Teams External question
Alison Cook
1
Reputation point
Cannot find Teams Admin site to enable external organization see my organization. Does anyone have step by step instructions?
Microsoft Teams | Microsoft Teams for business | Other
Microsoft Teams | Microsoft Teams for business | Other
Additional features, settings, or issues not covered by specific Microsoft Teams categories
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Sharon Zhao-MSFT 25,766 Reputation points Microsoft External Staff2020-03-16T07:15:54.94+00:00