Shared channels in Private teams - External sharing

Hello KatriTC

welcome to the Microsoft community, my name is Recep I'll be happy to help you today.

I understand that you are not able to share externally from private teams, 

Please note that the Microsoft 365 Groups guest settings must be turned on in order for people outside the organization to be added to a shared channel. If your users see this error, check the Microsoft 365 Groups settings for people outside the organization.

To set Microsoft 365 Groups settings for people outside the organization

1. In the Microsoft 365 admin center, in the left navigation pane, expand Settings.
2. Click Org settings.
3. In the list, click Microsoft 365 Groups.
4. Ensure that the Let group owners add people outside your organization to Microsoft 365 Groups as guests and Let guest group members access group content check boxes are both checked.
5. If you made changes, click Save changes.
   
   Teams channel policies determine how users can interact with shared channels. If users see this error message, check the channel policy for that user.

   To set the policy for inviting people outside the organization to shared channels

   1. In the left navigation of the Microsoft Teams admin center, go to Teams > Teams policies.
   2. Select the policy that your user is assigned to.
   3. Ensure that Invite external users to shared channels is On.
   4. If you made changes, select Apply.

      For more information about Teams channel policies, see https://github.com/MicrosoftDocs/OfficeDocs-SkypeForBusiness/blob/public/Teams/teams-policies.md

      
      I’d like to share such kind of information about external users in teams or channels in Microsoft Teams. If the users are not associated with the same Office 365 organization tenant, then those all users are treated as guest in any teams or channel in Microsoft Teams. So, for adding external users as a guest to teams or channel, we need to also enable Guest Access related configuration from Office 365 Microsoft Teams Admin Center and some other sections or portal.

       

      Following are the check lists for Guest access for Microsoft Teams. So, kindly also try to verify below configuration settings for Microsoft Teams and try to check the result after 24 hours.

       

      ·         Turn on guest access at the Teams org-wide level

      ·         Configure Azure AD business-to-business settings

      ·         Configure Office 365 Groups

      ·         Configure sharing in Office 365

      ·         Verify sharing setting in SharePoint

       

      So, kindly try to enable this guest access related option from different sections. Here is the detailed steps article about: https://docs.microsoft.com/en-us/microsoftteams/guest-access-checklist

       

      For your reference: I’d like to share one another information article about: https://docs.microsoft.com/en-us/microsoftteams/add-guests

       

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