Collaborate with external participants in a shared channel

If you want to enable your users to collaborate with people outside your organization in shared channels, you need to configure B2B direct connect for each organization that you want to collaborate with. (Alternatively, you can Enable shared channels with all external organizations.)

When you enable shared channels in Teams with another organization:

  • Team owners in your organization will be able to invite people from other organizations to participate in shared channels.
  • Your organization's custom (line of business) apps will be available in shared channels and external participants will be able to access them.
  • Your organization's apps list will be available in shared channels and external participants will be able to access them.

Video demonstration

This video shows the configuration steps described in this document.

Enable shared channels in Teams

Shared channels is enabled by default in Teams. Follow this procedure to confirm the settings.

To configure shared channels

  1. In the Teams admin center, expand Teams, and then select Teams policies.
  2. Select the policy for which you want to enable shared channels, and then select Edit.
  3. Select the options you want to enable:
    • To allow team owners to create shared channels, turn Create shared channels on.
    • To allow team owners to share shared channels with people outside the organization, turn Invite external users to shared channels on.
    • To allow users to be invited to shared channels in other organizations, turn Join external shared channels on.
  4. Select Apply.

In order for external channel participants to participate in meetings, external access must be enabled. This is also required to be able to see external participants' presence in the channel.

To enable external access

  1. In the Teams admin center, expand Users, and then select External access.
  2. Under Teams and Skype for Business users in external organizations, ensure that the organizations that you want to collaborate with are not blocked.

Configure cross-tenant access settings in Azure AD

Azure AD B2B direct connect is disabled by default. To enable collaboration in shared channels with people from other organizations, you must:

  1. Add an organization.
  2. Configure inbound settings for the organization to allow users from the organization to be invited to your shared channels.
  3. Configure outbound settings for the organization to allow your users to be invited to the other organization's shared channels.

As part of this configuration, we enable the Office 365 application, which includes Teams and Teams-integrated services such as SharePoint.

Note

Changes to cross-tenant access settings may take up to three hours fifteen minutes to take effect.

Add an organization

Add each organization with which you want to participate in shared channels.

To add an organization

  1. Sign in to Azure Active Directory using a Global administrator or Security administrator account.
  2. Select External Identities, and then select Cross-tenant access settings (preview).
  3. Select Organizational settings.
  4. Select Add organization.
  5. On the Add organization pane, type the full domain name (or tenant ID) for the organization and press Enter.
  6. Select Add.
  7. The organization appears in the organizations list. At this point, all access settings for this organization are inherited from your default settings.

Configure inbound settings

Follow this procedure for each organization where you want to invite external participants.

To configure inbound settings for an organization

  1. In Azure Active Directory, select External Identities, and then select Cross-tenant access settings (preview).
  2. Select the inbound access link for the organization that you want to modify.
  3. On the B2B direct connect tab, choose Customize settings.
  4. On the External users and groups tab, choose Allow access and All external users and groups. (You can choose Select external users and groups if you want to limit access to specific users and groups, such as those who have signed a non-disclosure agreement.)
  5. On the Applications tab, choose Allow access and Select applications.
  6. Select Add Microsoft applications.
  7. Select the Office 365 application, and then choose Select.
  8. Select Save and close the Inbound access settings blade.

Configure outbound settings

Follow this procedure for each organization where you want your users to be able to participate in external shared channels.

To configure outbound settings for an organization

  1. In Azure Active Directory, select External Identities, and then select Cross-tenant access settings (preview).
  2. Select the outbound access link for the organization that you want to modify.
  3. On the B2B direct connect tab, choose Customize settings.
  4. On the External users and groups tab, choose Allow access and set an Applies to of all users.
  5. On the External applications tab, choose Allow access and Select external applications.
  6. Select Add Microsoft applications.
  7. Select the Office 365 application, and then choose Select.
  8. Select Save, choose Yes to confirm, and close the Outbound access settings blade.

See also

B2B direct connect overview

Configure cross-tenant access settings for B2B direct connect

Limit who can be invited by an organization

Shared channels limits