Daily Limit on File Uploads for Microsoft 365 Copilot Enterprise

Hello Rob Swain,

As of June 2025, Microsoft 365 Copilot Chat enforces a daily file upload limit, particularly noticeable for users on the E3 plan. Reports indicate that users encounter a "daily upload limit" error after uploading three files within a 24-hour period.

This limitation seems to be specific to certain subscription tiers and may not be uniformly documented across all Microsoft resources. For instance, while some users with Copilot licenses can upload files up to 512 MB per prompt, others without such licenses face stricter constraints.

It's important to note that these limits can vary based on your organization's specific Microsoft 365 subscription and any associated Copilot licensing. If you're encountering this issue, consider the following steps:

Review Your Subscription Details: Check if your Microsoft 365 plan includes Copilot licenses, as this may affect your upload limits.

1. Contact Your IT Administrator: They can provide insights into any organizational policies or settings that might influence these limits.

Reach Out to Microsoft Support: For definitive information and potential solutions, contacting Microsoft Support can clarify any ambiguities related to file upload restrictions.

Given that Microsoft periodically updates its services and associated limitations, staying informed through official channels or support forums is advisable.

Best Regards,

Jerald Felix