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Microsoft Teams to Slack integration — real-time, two-way sync

Keep Microsoft Teams and Slack in sync without custom scripts. Cut weeks of integration work, eliminate silent data drift, and give your team a single, reliable source of truth.

  • SOC 2 and 6 other compliance frameworks
  • POC with real engineers in minutes

Adopted by fast-scaling companies moving mission-critical data in real time

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Why teams connect Microsoft Teams and Slack

Stop re-entering the same information in Microsoft Teams and Slack: Stacksync keeps the records they share consistent in real time, in both directions.

Two tools in the daily stack often hold overlapping information: the same people, the same companies, or the same pieces of work, described twice. The tools do different jobs, so consolidating is not the answer; the overlap just needs to stop drifting.

Stacksync syncs Online Meetings, Tabs & Installed Apps, Teams, Channels in Microsoft Teams with Channels, Messages, Threads, Users in Slack in real time. You choose which records overlap, map the fields that should match, and pick a direction or let changes flow both ways. From then on, an update made in either tool is reflected in the other within seconds, without exports or copy-paste.

Because the sync is field-level, each tool keeps its own extras; only the shared data is held in agreement.

Common use cases

  • Route support case updates from the CRM into a triage channel for faster response.
  • Archive channel messages into a warehouse for compliance and communication analytics.
  • Alert an operations channel when a data sync detects conflicts or validation failures
  • Post CRM record changes into deal or account channels so the team sees updates without opening the CRM

Where one tool produces events: mirror them in the other

Payments, replies, messages, or tickets created in one tool can create or update matching records in the other, keeping context in one place.

Where Slack is where the team documents or plans: keep its data fed

Information that originates in Microsoft Teams stays current in Slack instead of going stale after a one-time paste.

Handoffs between teams

When work started in one tool continues in the other, the shared fields travel with it automatically.

What you can sync between Microsoft Teams and Slack

Representative objects on each side — any object or custom field can map to any target. Schemas are auto-detected; types are converted between the two systems.

Microsoft Teams objects Slack objects
Channels Channel targets used for routing synced notifications and updates. User groups Handles like @support that map to teams in external systems.
Channel Messages Posted messages read for archiving or written to broadcast record changes. Files Uploads attached to messages, retrievable for archiving.
Chats & Chat Messages 1:1 and group chat content read under protected-API access for compliance use. Reactions Emoji responses that can drive workflows, such as approving a synced record.
Team Members & Users Membership synced with identity, HR, or CRM ownership data. Channels Conversations (public, private, DMs) that messages are read from and posted to.
Online Meetings Meeting records synced with scheduling and CRM activity timelines. Messages Keyed by channel and timestamp; posted via chat.postMessage and read via history methods.
Tabs & Installed Apps App configuration read to audit or provision team workspaces. Threads Replies grouped under a parent message timestamp, preserved when archiving conversations.
What ships with Microsoft Teams ⇄ Slack

Connect Microsoft Teams and Slack for flexible, real-time data sync.

Real-time sync, workflow automation, event queues, EDI, and monitoring, for every Microsoft Teams–Slack connection.

Real-time

Two-way sync

Changes in Microsoft Teams or Slack instantly reflect in both systems. No stale data, no manual imports.

No-code + pro-code

Workflow automation

Trigger automated workflows whenever Microsoft Teams or Slack data changes, update records, fire webhooks, or kick off sequences without brittle API scripts.

At scale

Event queues

Handle millions of events per minute without losing a single Microsoft Teams or Slack record.

Observability

Monitoring

Track your Microsoft Teams ⇄ Slack sync health, view errors, and replay failed events in one click.

Trading partners

EDI

Transform legacy EDI complexity into simple database interactions between Microsoft Teams and Slack.

How the Microsoft Teams and Slack connectors work

Microsoft Teams

Integration surface
REST API (Microsoft Graph)
Authentication
OAuth 2.0 via Microsoft Entra ID; reading message content at scale requires Microsoft-approved protected-API access
Change detection
Graph change notifications (webhooks) for messages and membership; delta queries on some resources
Capabilities
read · write · webhooks

Slack

Integration surface
Web API (HTTP RPC-style methods) plus the Events API
Authentication
OAuth 2.0 with bot or user tokens and granular scopes
Change detection
Events API webhooks, delivered over HTTP callbacks or Socket Mode
Capabilities
read · write · webhooks
Rate limits
Per-method rate limit tiers; message posting is additionally limited per channel
How it works

How to connect Microsoft Teams to Slack — three steps, no code

Configure and sync within minutes, no code. Whether you sync 50k or 100M+ records, Stacksync handles the queues, infra, and plumbing. Integrations are non-invasive and need zero setup on your systems.

  1. 01

    Connect your apps

    Authenticate Microsoft Teams and Slack with each platform's native method — OAuth, API keys, or service accounts — plus secure options like SSH tunneling, IP whitelisting, and VPC peering.

    • OAuth 2.0
    • SSH tunnel
    • VPC peering
    Microsoft Teams connected
    Slack connected
    OAuth 2.0
    SSH tunnel
    SSL certificate
    VPC peering
  2. 02

    Choose tables

    Pick the Microsoft Teams and Slack objects to sync — Stacksync auto-detects both schemas, including custom fields where the platform exposes them. Sync to existing tables, or let Stacksync create new ones with ideal data types.

    • Standard objects
    • Custom objects
    • Auto-schema
    objects · Microsoft Teams ⇄ Slack
    Customers 12,480
    Sales Orders 8,213
    Invoices 5,902
    Items 1,344
  3. 03

    Map fields

    Fields map automatically even when names and types differ. Stacksync handles transformation and type casting for you, zero configuration required.

    • Auto-map
    • Type casting
    • Transforms
    Microsoft Teams Slack
    Company company_name text
    Email email text
    Amount amount numeric
    Created created_at timestamp
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FAQ

Microsoft Teams and Slack integration FAQ

SECURITY

Security teams love Stacksync

As a data company, we understand the importance of keeping your data secure. Stacksync is built with security best practices to keep your data safe at every layer, and is DPF-certified for US, EU, UK and CH data transfers.

Learn more about security
SOC 2 type II
ISO 27001
HIPAA BAA
GDPR
CCPA
CSA STAR
DPF US-EU-UK-CH
→ SECURITY WITH BENEFITS

SSO & SCIM

Let your users access Stacksync from your centralized user management systems. Works with Okta, Azure, Google SSO and more.

Alerts

Immediately get alerted about record syncing issues over email, Slack, PagerDuty and WhatsApp. Resolve issues from a centralized dashboard with retry and revert options.

Secure connection options

Securely connects to your systems with:

OAuth 2 SSH Tunnelling SSL certificates IP Whitelisting VPN gateway VPC peering and more

Related integrations

Every pair below is a real-time, two-way sync. Search all 386 integrations available for Microsoft Teams and Slack.

Popular · 8 of 386
All Microsoft Teams integrations All Slack integrations Browse all integrations
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