To significantly improve prompt-grounding and accuracy during a Microsoft 365 Copilot conversation, you should explicitly reference specific files, folders, or emails. While Copilot automatically attempts to ground responses in your Microsoft Graph data, guiding it to precise, authorized sources reduces the risk of generating "ungrounded" (hallucinated) content.
Here are the best practices for referencing files to ground your Copilot prompts:
Methods for Referencing Files
Use the Forward Slash (/): Typing a forward slash (/) followed by the file name in the Copilot chat box is the primary way to bring up a list of relevant, recently used files.
Use the Attachment Icon: Click the attachment icon to browse your OneDrive or SharePoint for specific documents, spreadsheets, or presentations.
Explicit Naming: Use clear, descriptive names. For example: "Summarize the findings in
'/ProjectAlpha_Draft.docx'".
Copy/Paste Links: If a file does not appear in the suggestions, open the file in SharePoint or OneDrive, copy the link, and paste it directly into the prompt.
Reference:
https://www.datastudios.org/post/microsoft-copilot-prompting-techniques-structure-grounding- and-workflow-optimisation