You basically need to ensure external sharing is turned on for the Teams' SharePoint site BEFORE creating any shared channels (if you created shared channels whilst external sharing was turned off you'll need to re-create the shared channels unfortunately). I wrote a short blog on the subject a while back which may help: Private and Shared Channels in Teams | LinkedIn. After much confusion and lots of research, I now get where this is coming from and have it working well across multiple tenants. ![]() What am I missing? How do I enable external sharing on shared channel sites? Why is this not consistent with SharePoint, OneDrive, and Teams standard/private channels? However, I still receive the aforementioned error when trying to share externally. External Sharing shows “This site can be shared with new and existing guests”. The SharePoint admin console now indicates that I can share externally on the shared channel site. Set-PnPTenantSite -Url $SiteURL -SharingCapability ExternalUserSharingOnly As a workaround, I leveraged PNP PowerShell to enable external sharing with the following command: However, on the shared channel sites, External Sharing defaulted to “This site can't be shared externally”. On the General channel we are able to share with external users. In the SharePoint admin console > Sites > Active Sites, the team site in question has External Sharing set to “This site can be shared with new and existing guests”. In the SharePoint admin console > Policies > Sharing > External Sharing, both SharePoint and OneDrive are set to “New and existing guests”. Guest Access is On in the Teams admin console: We are able to share externally on Standard and Private channels. To continue sharing, remove the highlighted recipients.” “Your org doesn't allow sharing with these people. We get the following message when trying share with an external email address: We are unable to share files and folders on shared channels with external users.
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