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mcheatham's avatar
mcheatham
Copper Contributor
Aug 22, 2025

Microsoft 365 Copilot + SharePoint

Our organization recently purchased Microsoft 365 Copilot licenses for all of our employees. One of the major tasks that we would like to utilize Copilot for is analyzing and summarizing documents on SharePoint. However, there are a couple of issues that we hope Microsoft is developing fixes for.

  1. There appears to be a data limit. If a file is too large, then we get a message, "I'm sorry, the size of this file is beyond my response limit. Select a file smaller than 150 MB and try again." We often have files that are beyond the 150 MB limit and it's very important to us for Copilot to analyze documents larger than 150 MB.
  2. It appears Copilot can analyze multiple, separate files at the same time. However, Copilot creates an output for each individual file rather than combining them. In other words, 1 summary for the first file, a second for the second, etc. 

Both issues are related. Basically, we need Copilot to analyze/summarize larger files. Beyond the 150 MB limit. Is this something that Microsoft is developing? Also, if we ask Copilot to analyze separate files, is Microsoft developing a solution where Copilot will combine the output? 

6 Replies

  • Although the limits mentioned by pradejain​ (150 MB/file and a single summary per file) are confirmed by Copilot itself if you ask the question, there is an alternative.

    You can set up a custom built agent in SharePoint by specifying the site or library where your files are located.

    You can then ask the agent about the content of EVERYTHING in the repository. It won't generate a document-style report, but it will give you text-based answers that will make it reasonably easy for you to put together your own document of conclusions.

     

    Translated with https://www.deepl.com/?utm_campaign=product&utm_source=web_translator&utm_medium=web&utm_content=copy_free_translation (free version)

    • mcheatham's avatar
      mcheatham
      Copper Contributor

      Thank you OrganizadorDigital​! Copilot is still really new to us. When you say set up a custom build agent, how do you do that? Is that with Microsoft Tuning? 

      • OrganizadorDigital's avatar
        OrganizadorDigital
        Copper Contributor

        Take a look here, mcheatham​ 

        https://support.microsoft.com/en-us/office/get-started-with-sharepoint-agents-69e2faf9-2c1e-4baa-8305-23e625021bcf

         

  • pradejain's avatar
    pradejain
    Iron Contributor

    Hi mcheatham​ 

    1. The 150 MB file size limit Right now, Copilot won’t process files bigger than about 150 MB in the chat experience. That’s a hard limit in the current design, and it’s there because of how Copilot breaks content into chunks for the AI to read. Microsoft has said they’re working to expand Copilot’s capabilities over time, so bigger files should be possible in the future — but there’s no confirmed date yet.
    2. Multiple files = multiple summaries If you upload several files at once, Copilot will give you a separate summary for each one. It doesn’t yet combine them into a single, merged summary. This is something a lot of people have asked for, and Microsoft has acknowledged the feedback, so it’s on their radar.

    What you can do in the meantime

    • For large files: split them into smaller sections (by chapter, heading, or logical break) before sending them to Copilot, then stitch the summaries together.
    • For multiple files: merge the relevant parts into one document under 150 MB, then run that through Copilot for a single summary.
    • Or, instead of uploading, use Copilot inside Word, Excel, or PowerPoint to ask targeted questions about the content stored in SharePoint — sometimes that’s faster than summarizing the whole thing.
    • mcheatham's avatar
      mcheatham
      Copper Contributor

      Thank you pradejain​! Our organization is in the legal field so as you can imagine the records that we need Copilot to analyze are very voluminous. It's often difficult to split up documents without losing the bigger picture. Also, there are a lot of legal vendors announcing AI models that analyze documents from 500MB to 2GB. Will Copilot ever be able to compete? This seems like something Microsoft should be able to complete with. 

      We like that Copilot works with many of the other Microsoft Office 365 apps. However, this data limit issue could be a sticking point. 

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