Step-by-Step Guide: Migrating from Slack to Microsoft Teams (2026)

So you're leaving Slack. Maybe you're tired of the 90-day message limit on the free plan, or the per-seat pricing that balloons as your team grows. Whatever the reason, Microsoft Teams is a popular destination — especially if your company already pays for Microsoft 365. Teams starts at $4/user/month (Business Basic) and includes chat, video calls, file storage, and deep Office integration. For many orgs, that alone is reason enough to switch.

But migration isn't a click-and-done process. Slack and Teams store data differently, and a sloppy move can lose history, break workflows, and frustrate your team. This guide walks you through the full process — backup, migration, gotchas, and cleanup — so you land on your feet.

Why Teams? (And Why Not)

Teams shines when you're already in the Microsoft ecosystem: Outlook, SharePoint, OneDrive, and Office apps. You get native file editing, calendar sync, and powerful compliance tools. For $4/user/mo (vs Slack Pro at $8.75/user/mo), it's cheaper for most teams.

But Teams isn't perfect. Its channel structure can feel rigid compared to Slack's freeform threading. And if you love Slack's app directory and search, Teams can feel clunky. Check our Slack vs Microsoft Teams comparison for a deeper breakdown.

Before You Start: What to Back Up and Export

Slack won't give you a friendly "export all my data" button unless you're on a paid plan. Here's what to grab:

• Message history: Paid plans can export all public channels via Slack's export tool (Settings & admin > Workspace settings > Import/Export Data). Free plans are limited — you'll lose messages older than 90 days anyway.
• Files: Slack stores uploaded files. Download them manually or use a third-party tool like CloudFuze or BitTitan to bulk-transfer.
• Integrations: Document every bot, app, and webhook. Many Slack apps have no direct Teams equivalent.
• User list: Export your member list (email addresses, roles) from Slack admin. You'll need this to set up Teams.

Heads up: Direct messages and private channels are not included in standard Slack exports. You'll need a specialized migration tool (like Mover or ShareGate) to capture those, or accept losing that history.

The Actual Migration Steps

Step 1: Set Up Microsoft Teams

If you don't have a Microsoft 365 tenant, get one. Teams is included with Business Basic ($4/user/mo), Business Standard ($12.50/user/mo), or Enterprise plans. Create your organization, add users (you can sync from Active Directory or import a CSV), and assign licenses.

Step 2: Plan Your Channel Structure

Teams uses a hierarchy: Teams > Channels > Tabs. Slack's channels map naturally to Teams channels, but you'll need to decide on the top-level "Teams" groups. For example, a Slack workspace with channels like #design, #engineering, #marketing might become a single "Product" Team with those as channels, or three separate Teams. Keep it simple at first — you can reorganize later.

Step 3: Migrate Messages and Files

For small teams (under 50 users), you can do a manual copy-paste of key messages and upload files to SharePoint. For larger moves, use a migration tool:

• Microsoft's Migration Manager (free, included with M365) works for Teams-to-Teams, but not Slack-to-Teams. You'll need a third-party tool.
• CloudFuze ($5–$10/user) handles Slack to Teams with message history, file attachments, and user mapping.
• BitTitan MigrationWiz (per-user pricing) is reliable for enterprise migrations.

Expect the migration tool to map Slack users to Teams users by email, recreate channels, and copy messages with timestamps. Most tools take a few hours to a few days depending on data volume.

Step 4: Rebuild Integrations

Slack integrations don't carry over. You'll need to:

• Set up connectors in Teams for services like Jira, Trello, GitHub, etc.
• Recreate custom bots using Power Automate or Microsoft's Bot Framework.
• Update webhook URLs in external apps to point to Teams.

Step 5: Notify and Train Your Team

Don't just flip the switch. Announce the migration date, share a quick-start guide, and schedule a 30-minute walkthrough. Teams has different keyboard shortcuts, @mentions work differently, and the compose box behaves differently. Expect a dip in productivity for a week.

Common Gotchas (and How to Avoid Them)

• Lost direct messages: Unless you pay for a premium migration tool, DMs stay in Slack. Consider archiving Slack as a read-only resource for a month.
• File links break: Any Slack file URL shared in messages will be dead after migration. Use the migration tool's link-rewriting feature, or accept that old links will 404.
• Channel naming conflicts: Slack allows hyphens and underscores freely; Teams is more restrictive. Rename channels before migration if needed.
• Guest access: Slack and Teams handle external guests differently. You may need to re-invite external collaborators.
• Compliance and eDiscovery: If you need to retain chat history for legal reasons, make sure your migration tool preserves metadata and timestamps. Test with a small group first.

Post-Migration Checklist

• Verify that all channels and members are present in Teams.
• Check message history in a few channels for completeness.
• Test key integrations (e.g., does Jira notifications appear?).
• Confirm file access: open a few documents from within Teams.
• Update your company wiki and internal links to point to Teams.
• Set Slack to read-only or delete the workspace (after 30 days).
• Collect feedback from your team and adjust channel structure.

Should You Even Migrate?

Teams is a solid choice if you're already paying for Office 365. But if you're a small startup with no Microsoft ties, you might prefer Discord (free, no message limits) or Zulip (free, threaded conversations). For security-first orgs, Mattermost gives you self-hosted control. See the full list of Slack alternatives for other options.

FAQ

Q: How long does a Slack-to-Teams migration take? A: For a team of 50, expect 1–3 days with a migration tool. Manual migration can take weeks.

Q: Can I keep my Slack workspace active during migration? A: Yes. Most migration tools work by reading Slack data via API, so you can run both in parallel for a week or two.

Q: Will my Slack message history appear in Teams search? A: Only if you use a premium migration tool that indexes messages. Basic exports won't be searchable.

Q: What about Slack's free plan? A: You can't export messages older than 90 days on the free plan. That history is lost unless you upgrade to a paid plan temporarily.

Q: Is Teams really cheaper than Slack? A: At $4/user/mo for Business Basic, yes — compared to Slack Pro at $8.75/user/mo. But if you need advanced eDiscovery or compliance features, Teams Enterprise can cost more.