{
  "$type": "site.standard.document",
  "bskyPostRef": {
    "cid": "bafyreifbwlqz7ndh3tr4q4twcqiku3shm7dhz6ue2tjfhbv6x5uggwzvwe",
    "uri": "at://did:plc:xxrzfynfiasdpbxteqxi4jgq/app.bsky.feed.post/3mh7rjdjpcda2"
  },
  "description": "Microsoft 365 Copilot will support uploading .eml and .msg email files starting late February to March 2026, enabling users to provide email context for prompts. This feature is automatic, requires no admin setup, affects all Copilot users, and has no new compliance concerns.",
  "path": "/m365-message-center/message/mc1253750/",
  "publishedAt": "2026-03-17T01:00:10.000Z",
  "site": "https://blog.tophhie.cloud",
  "tags": [
    "**552591**"
  ],
  "textContent": "**[Introduction]**\n\nWe’re adding **support for .eml and .msg file uploads** in _Microsoft 365 Copilot_ , including **Copilot Chat** and the **Microsoft 365 Copilot app**. This update makes it easier for users to include email files as context when prompting Copilot, helping them generate more relevant and grounded responses.\n\nThis message is associated with **Microsoft 365 Roadmap ID****552591**.\n\n**[When this will happen]**\n\n  * **General availability (Worldwide):** Rollout begin in**late February 2026** and is expected to complete by**late March 2026**.\n\n\n\n**[How this affects your organization]**\n\n_Who is affected_\n\n  * All users in _Microsoft 365 tenants_ who have access to **Microsoft 365 Copilot Chat** or the **Microsoft 365 Copilot app**.\n\n\n\n_What will happen_\n\n  * Users will be able to upload .eml and .msg files directly when interacting with Copilot.\n  * Uploaded files can be used**as grounding context for prompts**.\n  * This feature is **available by default;** no admin configuration is required.\n  * There is no change to existing policies governing file handling or data access.\n\n\n\n**[What you can do to prepare]**\n\nNo action is required. This feature will roll out automatically.\n\nOptionally, you may:\n\n  * Inform helpdesk or support staff in case users ask about new upload capabilities.\n  * Update internal Copilot usage or prompt‑writing guidance to reflect expanded supported file types.\n\n\n\n**[Compliance considerations]**\n\nNo compliance considerations identified. Review as appropriate for your organization.",
  "title": "MC1253750: Microsoft 365 Copilot: Upload local files now supports .eml and .msg file types",
  "updatedAt": "2026-03-17T01:00:10.750Z"
}