Enhanced support for large files in Copilot Chat​​​​​​​

March 27, 2025

New this month
New features in Copilot
Access customized agents from the Copilot Chat web tab

• Expanded functionality: Agents are now available in both the web and work tabs of Microsoft 365 Copilot Chat. Select Get agents from the navigation pane to explore agents available to you.
• Custom AI assistance: Access agents tailored to your organization, integrating work and web knowledge for more relevant insights.​​​​​​​

Enhanced support for large files in Copilot Chat​​​​​​​
Work with big files: When using “/” to find and select work files, get more comprehensive summaries for files with a lot of text, such as reports with hundreds of pages or PDFs with extensive terms and conditions.

Optimize agents with contextual web data

• Targeted web sources: Create agents that utilize data from up to four specific public websites.
• Context-aware: Agents can deliver more relevant responses by leveraging information from selected sites.

Fresh prompt suggestions in Excel
Ongoing inspiration: Open Copilot in Excel to explore a continuously updated selection of prompts that can help you level up your spreadsheets.​​​​​​​

Improvements based on feedback
Generate slide-specific speaker notes with Copilot
Effortless preparation: Copilot crafts speaker notes tailored to each slide, saving time and improving clarity.
Polished delivery: Enhance your presentations with AI-generated notes that align perfectly with your slides.
Learn more about creating speaker notes with Copilot

Reference plain text files while drafting with Copilot
Expanded sources: Plain text files in .txt format can now be referenced in Draft with Copilot, making it easier to integrate content seamlessly.
Quick reference: Easily find your plain text file in Draft with Copilot by entering “/” followed by the name of the file you want to reference.