Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi @Rob Swan
Welcome to our Q&A Microsoft forum
Based on our research, Microsoft has not published any official documentation specifying limits on the number of file uploads or file sizes for Microsoft 365 Copilot Enterprise.
While there are no formal restrictions, we recommend using shorter documents, when possible, as Copilot tends to perform best with more concise content.
You can visit for more information at Keep it short and sweet: a guide on the length of documents that you provide to Copilot - Microsoft Support
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