Connect Slack & Microsoft Teams: How to Create Channel Links

Finding a way to connect Slack and Teams channels has long been a challenge for businesses. Alongside Google Chat, Slack and Microsoft Teams are the two most popular messaging programs for startups, scaleups, and enterprise teams.

So why are they so difficult to connect? It’s clear that there is a lack of secure, simple and scalable Slack and Microsoft Teams integrations available, and most solutions have limited chat interoperability features.

Conclude Connect has solved the Slack and Microsoft Teams integration problem with a solution that enables teams to connect Slack and Teams channels for internal or external communication.

Since we’re often asked about the difference between internal and external channel connection functionality, this blog explains how each works and provides some simple use cases to help you choose the best for your business.

Ready to streamline your communication across Slack and Teams? Get started free for 14 days.

Slack and Microsoft Teams Integration

Conclude Connect is designed to support direct collaboration between people who use Slack and Microsoft Teams – whether they’re in the same company or working across different organizations. It’s used by teams of all sizes to connect Slack and Teams channels for internal collaboration, or external communication with clients, partners, and vendors.

Connecting both platforms helps to reduce silos, improve visibility, and keep conversations moving, without the need to switch apps or duplicate messages.

For more information about connecting chats, see: Chat Between Slack and Teams: How to Bridge the Gap

How to Set Up Conclude Connect

After signing up and completing the onboarding process, you can activate internal or external connections. This is done from the web dashboard, by toggling the switches to the ‘on’ position.

Additionally, Conclude offers ticketing solutions for Slack and Microsoft Teams, including an optional Zendesk and Jira integration which can also be activated from the web dashboard.

Depending on which solution is activated, you’ll see the following options in the sidebar:

• Connect internal > Channels and > Chat
• Connect external > Channels

Both options allow you to connect selected channels between Slack and Microsoft Teams so conversations can happen seamlessly across platforms.

Not sure which setup is right for your team? The next sections walk through common use cases for both internal and external connections.

External Communication Problem

Your company just landed an important new client. The client wants to reduce email and move communication into chat. They prefer Microsoft Teams, but your company uses Slack.

One solution is to open a Teams account, create a team (or tenant) and invite the client’s team as external members. But this approach adds unnecessary complexity. Now your team is context switching between chat platforms, increasing the chance of missed messages, duplicated conversations, and growing information silos.

Best Solution: Connect External Channels

The most efficient option is to connect external channels using Conclude Connect. This allows both companies to chat in their platform of choice (Slack or Microsoft Teams) without creating new accounts or switching tools.

Additionally, only the inviting company needs to have a Conclude licence. External invitees can join without paying for additional seats or subscriptions. Once set up, all messaging stays in sync with no platform switching required.

Here’s how it works:

• Sign up for Conclude and activate Connect (external connections) from the web dashboard
• Navigate to Connect external > Channels
• Next, invite external users by email to link two channels for cross-company collaboration
• Once the invitation is accepted, the external company can add more members from their side
• Sync messages, images, and files bi-directionally to keep communication aligned on both platforms

See our Connect External Quickstart Guide for more details.

Internal Communication Problem

Your company has a problem with teams that chat or work on both Slack and Microsoft Teams – or maybe multiple Slack workspaces within the same organization. This often happens when one tool lacks the specific integrations or features a department needs, e.g. customer support or IT help desk functionality.

This results in disconnected teams, missed messages, and duplicated work. This silo effect is even more common in large companies or after a merger or acquisition, where different systems and messaging programs may still be in use across departments.

One option is to mandate that everyone uses the same chat tool, but in practice, teams have strong preferences. Many IT and engineering teams prefer Slack, which often leads to shadow messaging inside the organization.

Best Solution: Connect Internal Channels

Conclude Connect for internal connections is the best solution to ensure better internal cross-team communication, with no tool switching, duplicated messages and friction between teams.

Here’s how it works:

• Sign up for Conclude and add your Slack and Microsoft Teams accounts
• Select Connect (internal connections) from the web dashboard
• Navigate to Connect internal > Channels in the sidebar
• Click New connection to select the Slack and Teams channels you want to link
• Once connected, conversations are synced across platforms, and teams can edit and delete messages, share files and images, @mention colleagues and more
  

See our Connect Internal Quickstart Guide for more details about getting started.

You can also set up chats under Connect internal > Chat. This works as a standalone feature – no need to connect channels first.

Want to learn more about how to connect Slack and Teams chats, not just channels? Read our detailed guide: How to Connect Microsoft Teams Chats with Slack.

Channel Connection Types Between Slack and Teams

When using Conclude, most channel connections are supported, but there are a few things to note:

Slack Channels

You can link public and private Slack channels, but the user setting up the connection must be a member of the Slack channel. This is also the case if the user is initiating an external channel connection from Slack.

Microsoft Teams Channels

Standard, private, and shared channels are all supported. The user setting up the connection must belong to the tenant that owns the channel and be a member of the channel.

Guest Users

Guest users can participate in synced channels and their messages will be included. However, they can’t create or manage connections for channels or chats outside of their own workspace or tenant, due to platform-level restrictions.

If you’re unsure whether a specific channel can be connected, check that the user that is setting it up is both a member of the channel and part of the Slack workspace or Teams tenant where the channel is hosted.

Connecting Different Workspaces

In some cases, your organization may need to connect teams across multiple workspaces or Microsoft tenants, for example, if different departments are using separate Slack workspaces or Teams environments.

Connecting different workspaces is only relevant for internal connections. External connections are established by inviting users to collaborate in linked channels and by default, they belong to a different workspace.

To manage and connect different workspaces:

• Go to Settings > Admin > Workspaces from the Conclude dashboard
• Add a new Slack workspace or Microsoft Teams tenant by clicking Add to Slack or Add to Microsoft
• Once added, these workspaces and tenants can be selected when creating internal connections
• You can also remove or disconnect unused workspaces from this panel at any time

This setup ensures Conclude Connect can sync the right permissions and access levels across platforms, especially in larger organizations with multiple environments.

Teams and Slack Integration: Key Takeaways

Whether you’re working across departments or with external partners, Conclude Connect offers a simple way to connect Slack and Teams channels and chats. Keep collaboration flowing by choosing the setup that best fits your company’s needs.

Ready to get started? Start your free 14-day trial here.

Frequently Asked Questions

Why connect Slack and Teams?

Connecting Slack and Microsoft Teams helps reduce context switching, improves communication between departments or companies, and keeps conversations centralised. Instead of duplicating messages or relying on email to fill the gaps, both sides can chat from their platform of choice with all messages, files, and replies kept in sync.

Is Slack compatible with Microsoft Teams?

Not by default. Slack and Teams don’t offer native interoperability for messaging. That’s where Conclude Connect acts as the bridge between both platforms, allowing you to create real-time connections between channels or chats. With Conclude, you can work across platforms as if they were one.

What are the requirements to link Slack & Teams?

To set up a connection with Conclude, you’ll need admin permissions in at least one of the platforms (Slack or Microsoft Teams). For internal connections, both workspaces or tenants should be added from Conclude’s web dashboard. For external connections, only the inviting organization needs a Conclude license – the invited company doesn’t need additional licenses, just a Conclude account.

How do I connect a Slack channel to Teams?

After signing up to Conclude, go to the web dashboard and activate Connect (internal connections) or Connect (external connections), depending on your use case. From there, you can select the Slack and Teams channels you want to link. Once the connection is active, messages, files, images, and replies are synced across both platforms. Step-by-step instructions are available in our Quickstart Guides.

Can I connect Microsoft Teams chats with Slack?

Yes you can. If your goal is to sync conversations between a Teams channel or chat and a Slack channel, you’ll need to use Conclude Connect to create that integration. Read our guide on How to Connect Microsoft Teams Chats with Slack for more details on how to set this up.

This article was first published in August 2022 and last updated in July 2025.