Add SharePoint list as a knowledge source for Agent Builder - #105
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Document single SharePoint list support in Agent Builder knowledge: - List SharePoint list in the 'You can add' summary and SharePoint/OneDrive limits (up to one list per agent) - Add list-specific limits: 20,000 item (row) max, attachment/lookup columns unsupported, site selection doesn't ground on lists - Note URL paste and the 'Recent lists' picker option for adding a list Doc request: https://dev.azure.com/bacx/content/_workitems/edit/47095 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Sophie Roy (sophie-roy3)
requested review from
Laura Graham (Lauragra) and
Copilot
June 9, 2026 19:00
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Pull request overview
Documents the newly GA support for using a single SharePoint list as a knowledge source in Agent Builder, alongside existing website/SharePoint/OneDrive/Teams sources.
Changes:
- Adds SharePoint lists to the “You can add” knowledge source summary and the browse picker description.
- Documents SharePoint list limits (one list per agent; max 20,000 items; unsupported list features) and clarifies list selection behavior.
- Adds guidance for adding a list via URL and via the picker’s “Recent lists” entry.
| When you reference a SharePoint list, the following limits apply: | ||
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| - A SharePoint list can have a maximum of 20,000 items (rows). | ||
| - Referencing attachment columns or lookup columns in SharePoint lists isn't supported. |
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Thanks. The combined "attachment columns or lookup columns isn't supported" phrasing is the verbatim wording in the Microsoft 365 Copilot support article Refer to specific files and more in Microsoft 365 Copilot, which is the matching surface for Agent Builder (same 20,000-item limit). To address your point about precision, I split the line and added the canonical behavior from Copilot Studio quotas and limits: the Attachments column isn't indexed or reasoned over (the list still indexes; the agent just doesn't answer from attachment contents). Updated in 8739672.
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| Enter a URL for a SharePoint site, folder, or file, such as `contoso.sharepoint.com/sites/policies`. The agent searches the URL and subpaths. For example, a URL such as `contoso.sharepoint.com/sites` also includes subpaths like `contoso.sharepoint.com/sites/policies`. The agent uses relevant information to provide a targeted response. | ||
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| You can also enter a URL for a SharePoint list. Copy the link to the list and paste it as the URL. |
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Good catch. Updated in 62727bd: the list-URL guidance now tells users to paste a direct link to the specific list (not a filtered or grouped view, which is where query parameters come from), and explicitly notes that entering a SharePoint site URL doesn't include the lists in that site — consistent with the grounding limitation above.
Address Copilot review feedback: a site URL doesn't include the lists in that site, and a direct list link (not a filtered/grouped view) should be pasted as the URL. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…rePoint lists Add two SharePoint list limitations from the canonical limits docs: - Document libraries aren't supported as lists. - The Attachments column isn't indexed or reasoned over (list still indexes; no responses from attachment contents). Split the former combined attachment/lookup line so the Attachments behavior is stated precisely and doesn't contradict the new note. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
- Add 50 MB raw-text limit alongside the 20,000-item cap, with truncation behavior - Invert column behavior: lookup columns aren't indexed; attachment columns aren't supported - Remove the document libraries note (not a SharePoint list) - URL guidance: use the Share or Copy link button on the list Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Barry Shehadeh (BarryShehadeh)
approved these changes
Jun 17, 2026
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Danipocket
reviewed
Jul 7, 2026
Co-authored-by: Danipocket <88507770+Danipocket@users.noreply.github.com>
Danipocket
approved these changes
Jul 7, 2026
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Summary
Documents single SharePoint list support in Agent Builder knowledge sources (now GA, works alongside other knowledge sources).
Changes to
docs/agent-builder-add-knowledge.md:Work items
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