u/X_peculator

I’m testing 365 Copilot (full version) for regulatory and methodology support use cases, and I’m trying to better understand how the knowledge retrieval/indexing works behind the scenes.

When I attach documents directly in Copilot, I hit a few limitations:
• Around 100 attached files max
• Some formats like JSON and Markdown are not accepted

However, when I upload the same files to a SharePoint folder instead, Copilot seems able to:
• Access many more documents
• Read JSON and Markdown files
• Cite those files in responses

So now I’m trying to understand what is actually happening technically.

Main question:
How can I be sure that all documents in the SharePoint location are being indexed and considered by Copilot?

More specifically:
• Is there any official documentation explaining how SharePoint content is indexed for 365 Copilot?
• Are there limits related to number of files, file size, indexing delay, permissions, or supported formats?
• Is there any way to validate coverage/completeness of the knowledge base?
• Are JSON and Markdown officially supported in this scenario, or is Copilot just partially reading them through search/indexing?

Would really appreciate insights from people who have tested this in enterprise environments or found official technical references/documentation.

I’m testing Microsoft 365 Copilot (full version) for regulatory and methodology support use cases, and I’m trying to better understand how the knowledge retrieval/indexing works behind the scenes.

When I attach documents directly in Copilot, I hit a few limitations:
• Around 100 attached files max
• Some formats like JSON and Markdown are not accepted

However, when I upload the same files to a SharePoint folder instead, Copilot seems able to:
• Access many more documents
• Read JSON and Markdown files
• Cite those files in responses

So now I’m trying to understand what is actually happening technically.

Main question:
How can I be sure that all documents in the SharePoint location are being indexed and considered by Copilot?

More specifically:
• Is there any official Microsoft documentation explaining how SharePoint content is indexed for Microsoft 365 Copilot?
• Are there limits related to number of files, file size, indexing delay, permissions, or supported formats?
• Is there any way to validate coverage/completeness of the knowledge base?
• Are JSON and Markdown officially supported in this scenario, or is Copilot just partially reading them through search/indexing?

Would really appreciate insights from people who have tested this in enterprise environments or found official technical references/documentation.

I’m testing Microsoft 365 Copilot (full version) for regulatory and methodology support use cases, and I’m trying to better understand how the knowledge retrieval/indexing works behind the scenes.

When I attach documents directly in Copilot, I hit a few limitations:
• Around 100 attached files max
• Some formats like JSON and Markdown are not accepted

However, when I upload the same files to a SharePoint folder instead, Copilot seems able to:
• Access many more documents
• Read JSON and Markdown files
• Cite those files in responses

So now I’m trying to understand what is actually happening technically.

Main question:
How can I be sure that all documents in the SharePoint location are being indexed and considered by Copilot?

More specifically:
• Is there any official Microsoft documentation explaining how SharePoint content is indexed for Microsoft 365 Copilot?
• Are there limits related to number of files, file size, indexing delay, permissions, or supported formats?
• Is there any way to validate coverage/completeness of the knowledge base?
• Are JSON and Markdown officially supported in this scenario, or is Copilot just partially reading them through search/indexing?

Would really appreciate insights from people who have tested this in enterprise environments or found official technical references/documentation.