---
name: teams-migration
description: Migrate MS Teams chat content to channels or between chats. USE WHEN teams migration, migrate chat, copy messages, teams channel, move chat history, teams backup, chat to channel. SkillSearch('teamsmigration') for docs.
---

## Customization

**Before executing, check for user customizations at:**
`~/.claude/skills/PAI/USER/SKILLCUSTOMIZATIONS/TeamsMigration/`

If this directory exists, load and apply any PREFERENCES.md, configurations, or resources found there. These override default behavior. If the directory does not exist, proceed with skill defaults.

## Voice Notification

**You MUST send this notification BEFORE doing anything else when this skill is invoked.**

1. **Send voice notification**:
   ```bash
   curl -s -X POST http://localhost:8888/notify \
     -H "Content-Type: application/json" \
     -d '{"message": "Running the WORKFLOWNAME workflow in the TeamsMigration skill to ACTION"}' \
     > /dev/null 2>&1 &
   ```

2. **Output text notification**:
   ```
   Running the **WorkflowName** workflow in the **TeamsMigration** skill to ACTION...
   ```

# TeamsMigration

Migrate MS Teams meeting chat or group chat content to team channels, preserving sender attribution, timestamps, images, and attachments. Uses the `teams-mcp` MCP server for reading and the Microsoft Graph API directly for high-volume batch posting with automatic token refresh and rate limiting.

## Workflow Routing

| Workflow | Trigger | File |
|----------|---------|------|
| **MigrateChat** | "migrate chat", "copy chat to channel", "move messages" | `Workflows/MigrateChat.md` |
| **ExportChat** | "export chat", "backup chat", "download messages" | `Workflows/ExportChat.md` |

## Examples

**Example 1: Migrate a meeting chat to a team channel**
```
User: "Migrate the Teams meeting chat to the DevOps channel"
--> Invokes MigrateChat workflow
--> Verifies auth, fetches all messages with pagination
--> Filters system/deleted messages, reverses to chronological order
--> Posts each message with sender + timestamp attribution
--> Verifies count parity and spot-checks content
```

**Example 2: Export chat messages to a local file**
```
User: "Export all messages from our DevOps chat"
--> Invokes ExportChat workflow
--> Fetches all messages with full pagination
--> Saves to JSON file with metadata
```

## Quick Reference

- **MCP Server:** `@floriscornel/teams-mcp` (npm)
- **Auth file:** `~/.msgraph-mcp-auth.json`
- **Token cache:** `~/.teams-mcp-token-cache.json`
- **Auth command:** `npx @floriscornel/teams-mcp@latest authenticate`
- **Migration tool:** `Tools/MigrateChat.mjs` (Node.js, no dependencies)

## Key Learnings

- **Graph API `descending: false` not supported** -- fetch descending, reverse array
- **`download_message_hosted_content`** only works for channel messages, not chat messages
- **Token auto-refresh** via MSAL refresh token in `~/.teams-mcp-token-cache.json`
- **Rate limiting** handled by respecting `Retry-After` header on 429 responses
- **For bulk posting (50+ messages)** use `Tools/MigrateChat.mjs` directly via Graph API instead of MCP tool calls
- **Account must have Teams license** -- `Chat.*` endpoints fail without it (403)

---

## Gotchas

- **Graph API ignores `descending: false` on chat messages:** Endpoint silently returns descending order anyway. Always fetch descending, reverse the array locally — assuming ascending will post messages in reverse chronological order to the destination.
- **`download_message_hosted_content` works only for channel messages, not chat messages:** Images in meeting/group chats need a different code path through `/chats/{id}/messages/{id}/hostedContents`. Calling it on a chat message returns 404 with a misleading "content not found".
- **MSAL refresh token in `~/.teams-mcp-token-cache.json` expires after 90 days idle:** First migration after a long gap fails with `AADSTS700082`. Re-run `npx @floriscornel/teams-mcp@latest authenticate` — token refresh is silent until it isn't.
- **`Chat.*` Graph endpoints require a Teams license on the calling account:** Service accounts without a license return 403 with text that mentions permissions, not licensing. Verify with `az ad user show --id <upn> --query assignedLicenses` before debugging Graph scopes.
- **MCP tool calls hit a per-second rate limit around 50 messages:** Bulk migrations through the MCP layer get throttled into hours. For 50+ messages, bypass MCP and use `Tools/MigrateChat.mjs` directly against Graph with `Retry-After` handling.
- **Posting preserves sender name in body text, not metadata:** The destination channel shows the migration bot as the author, with the original sender embedded in the message text. Compliance/eDiscovery queries on author will miss migrated content entirely.