Copilot Studio using a private SharePoint website as source of knowledge on Public website

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Posted on by Dana-Hasan

Hi,

I am wondering if we have an Agent built on Copilot Studio that will use a private SharePoint as a knowledge source in public website. Is there a way to implement this, and if so, what authentication setup is needed?

Thanks

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PG-27020946-0 2 on at

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I've the same question but have seen the following on the page at https://learn.microsoft.com/en-us/microsoft-copilot-studio/knowledge-add-sharepoint: "Generative answers from SharePoint sources aren't available to guest users in SSO-enabled apps".

I take that to mean that there's no way to do this, not even if you make your SharePoint folder publicly available.

To cut my losses I used Matthew Devaney's excellent video at https://www.youtube.com/watch?v=q-6wTZfF2iQ which uses PowerAutomate to synchronise an agent's knowledge with the contents of a SharePoint site / folder.

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CU27021113-0 4 Microsoft Employee on at

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I dont think you can. Sharepoint will need some sort of security/auth so when you publish to the cloud/browser users wont be able to access the content.

I tried to do something similar and came across this same hurdle.

Copilot Studio sits on top of Microsoft Graph so it has to respect SharePoint permissions, which means if your agent uses private M365 data, users will need to sign in and if you want it fully public with no signin you’re limited to public data sources. Sozzle!

Workarounds are basically
1. Duplicate the content onto a public site and use that as your data source
2. Build a custom API layer that reads from SharePoint with app-level permissions and exposes only what you want (but that’s custom dev, not out-of-the-box Copilot Studio).

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Arild Aarnes 551 Super User 2026 Season 1 on at

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Hi @Dana-Hasan,

If you are thinking about publishing an agent to be used at a public website (with no authentication), then you can not use SharePoint as a knowledge source.
the only knowledge sources available when you use no authentication is public websites, and files uploaded directly to the agent.

Knowledge sources summary - Microsoft Copilot Studio | Microsoft Learn

Regards,
Arild

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