SOLVED

I cannot add external participants in a shared channel in Teams

3 Replies

The AtanasM,

Please check:

 

In "External Identities > Cross-tenant access settings": add the other organization.

The other organization also has to add your organization in their tenant.


In "External Identities > Cross-tenant access settings > Added organization"
- Your Microsoft 365 organization has to configure the B2B collaboration and B2B direct connect settings (inbound and outbound access)
- The other Microsoft 365 organization ALSO has to configure the same the B2B collaboration and B2B direct connect settings (inbound and outbound access)
- Start with allow "all users and groups" and "all applications". You can narrow it down later

In "External Identities > External collaboration settings". Collaboration restrictions: “allow invitations to be sent to any domain (most inclusive)”. This is also the default setting.

In Microsoft Teams admin center > Teams policies > Global (Org-wide default). Check toggle on
- Invite external users to shared channels
- Join external shared channels

I did all these steps, but still cannot add guests.
best response confirmed by AtanasM (Iron Contributor)
Solution
Hi AtanasM,

This can be a solution in the future:

MC635987 (July 11, 2023): "...provide a way for organizations to capture and redirect requests for external collaboration when users attempt to add an external member to a shared channel where B2B direct connect cross-tenant trust has NOT been mutually configured between the two organizations.”
1 best response

Accepted Solutions
best response confirmed by AtanasM (Iron Contributor)
Solution
Hi AtanasM,

This can be a solution in the future:

MC635987 (July 11, 2023): "...provide a way for organizations to capture and redirect requests for external collaboration when users attempt to add an external member to a shared channel where B2B direct connect cross-tenant trust has NOT been mutually configured between the two organizations.”

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