The Microsoft 365 Copilot app (also known as Copilot with Graph-grounded chat) provides a unified, cross-device chat experience. A user's chat history is synchronized, allowing them to start a conversation on the web and continue it on their mobile device. The interface allows for uploading local files to ground the conversation in specific, immediate context. It also supports the use of agents (Copilot GPTs) for specialized tasks. When deeper work is needed, it provides links to open relevant content directly in the corresponding Microsoft 365 app (e.g., Word, PowerPoint).

A. The Copilot app is the primary chat interface for all licensed users, not an admin-only portal. Chat history and file uploads are core features.

C. The mobile experience is fully functional, allowing content creation, agent use, and secure access to work data via Microsoft Entra ID authentication.

D. Copilot Chat strictly adheres to the user's existing permissions. It can only access files and data that the user is already authorized to see via Microsoft Graph.

1. Microsoft. (2024). Microsoft Copilot with Graph-grounded chat. Microsoft Learn. This document states, "Copilot with Graph-grounded chat lets you...access and orchestrate content and context across the Microsoft 365 ecosystem...It's available at Copilot.microsoft.com, and in Teams, and the Microsoft 365 mobile app." It also details the ability to reference specific files.

2. Microsoft 365. (2023, November 15). Welcome to your Copilot for Microsoft 365. Microsoft 365 Blog. The article describes the central web experience at Copilot.microsoft.com as a "hero experience" and highlights its ability to work across "your entire universe of work data," which is accessible on both web and mobile, respecting user permissions.