Enable shared channels with all external organizations
Article
While sharing shared channels externally is enabled by default in Teams, Microsoft Entra cross-tenant access settings for B2B direct connect must also be configured to share a channel externally. By default, these settings are set to block all organizations.
You can change the B2B direct connect default settings to allow all organizations. This allows users to collaborate in shared channels without your organization having to create a separate configuration for each organization that you want to collaborate with. (Note that the organizations you collaborate with will also have to configure their B2B direct connect settings.)
If your organization doesn't have a requirement to restrict collaboration with other organizations, enabling all organizations by default can save you time and complexity in managing each organization separately.
Note
Changes to cross-tenant access settings may take two hours to take effect.
Work with external users in Teams and the access controls from different places, including Microsoft Entra ID, Microsoft 365, Teams, and SharePoint admin centers.
Demonstrate skills to plan, deploy, configure, and manage Microsoft Teams to focus on efficient and effective collaboration and communication in a Microsoft 365 environment.