Launched

Microsoft Copilot (Microsoft 365): Upload Local Files now Support .eml and .msg file types

Why it matters: Generally available

Users will now be able to upload .eml and .msg files and share it as context with Copilot Chat and M365 Copilot App.

Target February CY2026Cloud WorldwidePlatform Desktop, WebSource updated 2026-04-13

Affected: Microsoft Copilot (Microsoft 365)