Please provide this article to your Microsoft Administrator to allow access to the shared Teams Support Channel
To allow Microsoft Teams to accept messages from a shared channel on a different tenant, you need to configure Microsoft Entra ID (formerly Azure AD) and Microsoft Teams settings across both your home tenant and the external tenant. Here are the required steps:
✅ 1. Enable Cross-Tenant Access Settings (Microsoft Entra ID)
On both tenants:
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Go to Microsoft Entra Admin Center → External Identities → Cross-tenant access settings.
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Select Organizational settings, then add the other tenant by domain or tenant ID.
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Under B2B direct connect, enable inbound and outbound access for Microsoft Teams and shared channels:
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Users and groups: Allow access or define specific users/groups.
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Applications: Ensure Microsoft Teams is allowed.
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Tip: You can apply these settings broadly (for all users) or fine-tune access per user group.
✅ 2. Enable Shared Channels in Teams Admin Center
On your tenant:
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Go to Teams Admin Center → Teams policies.
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Select or create a policy and make sure:
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Create shared channels is On
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Invite external users to shared channels is On
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Join external shared channels is On
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Assign this policy to the relevant users.
✅ 3. External Access and Guest Access (Optional but related)
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Go to Teams Admin Center → Org-wide settings → External access:
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Ensure that communication with the other tenant is allowed.
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Go to Teams Admin Center → Org-wide settings → Guest access:
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Although shared channels use B2B direct connect (not guest access), make sure it’s configured properly if you're using guest collaboration in parallel.
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✅ 4. Teams Client Configuration
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Make sure users in both tenants are using Teams clients that support shared channels (Desktop or Web, not mobile for full features).
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Allow third-party cookies and sign-in across tenants if users experience access issues in browser-based Teams.
✅ 5. Firewall & Network (if applicable)
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Ensure that your network or firewall doesn’t block Microsoft Teams endpoints or cross-tenant communications.