How to Set up a Conference Call in Microsoft Teams with External Users: External Users Made Simple

Setting up a conference call in Microsoft Teams with external users is easier than you think—once you know the right steps. ⚡ I’ve helped dozens of small businesses and remote teams connect with clients and partners without the usual tech headaches, and the process takes less than five minutes if you follow along.

The key is making sure your organization’s settings allow outside participants before you even create the meeting.

First, you’ll need to confirm two things: your Teams account has external access enabled (check under Organization settings in the admin center) and the guests you’re inviting have valid email addresses from approved domains. For most users, that’s it—no extra software or complex permissions.

I’ve seen people get stuck here because they assumed their company blocked external calls, but it’s usually just a quick toggle in the admin panel.

Once that’s done, creating the call is straightforward: click Meet now or schedule a meeting, then add the external users’ emails in the Add required attendees field. You can even set up a dial-in number for participants who prefer phone audio, which cuts down on connection issues.

The meeting lobby feature gives you control over who joins first, and Teams will automatically send a calendar invite with all the details.

After the call, don’t forget to remove sensitive participants from your organization’s list and clean up any recordings if needed. I’ve seen people accidentally leave old meeting files sitting in their Teams folders, so taking two minutes to organize afterward saves future confusion.

The whole process—from setup to cleanup—is designed to feel seamless, even for first-timers.

What you need

Step-by-Step instructions for hosting a Microsoft Teams call with outside participants

Here's the straightforward way to invite external guests—no tech headaches, just a smooth setup.

Open the Microsoft Teams desktop app or web version. Click the Calendar icon in the left sidebar, then select New meeting. This opens the meeting creation window where you'll define the call details.

In the Subject field, type a clear name like "Project Kickoff with Vendors." Below that, set the Start time and End time. I always recommend scheduling it at least 15 minutes before the actual start time to account for late joiners or technical hiccups.

Here's the thing—when adding guests, don't just type email addresses yet. First, click the Meeting options link (just below the time fields). This is where you control who can join and how.

In the Meeting options panel, scroll down to Who can present? and select People in my organization and allowed external users. This ensures outside participants can share their screens if needed.

Next, find the Allow callers to bypass the lobby toggle. I don't recommend enabling this unless you're meeting with very trusted external partners—otherwise, leave it off to screen attendees before they join the call.

Below that, locate Who can join the meeting? and select People in my organization and allowed external users. This is critical—without this setting, external users will get a "You don't have permission" error when trying to join.

After saving your meeting options, return to the meeting window. In the Add required people field, type the email addresses of your external participants. Teams will automatically suggest contacts from your organization—just ignore those suggestions for now.

Click Send to invite them via email. The external users will receive an email with a Join Microsoft Teams Meeting link. Here's what they'll see: a calendar invite with the meeting details and a button to join directly through their browser or the Teams app.

Real talk: If external users don't receive the invite, double-check that their email addresses are correct and that they aren't using a blocked domain. Some organizations restrict external meeting invites by default—you might need to add their domain to your organization's allowed list in the Teams admin center.

Log into your meeting 5-10 minutes before the scheduled start time. Click Join now to test the audio and video setup. This also lets you verify that external users can join without issues.

While in the meeting, go to the Participants list (click the Participants button at the bottom of the screen). Here, you'll see all attendees—both internal and external. If external users aren't appearing, ask them to try joining again or check their internet connection.

To ensure a smooth experience, I always recommend testing with one external user first. Have them join and verify their audio and video work before the full group arrives. This way, you can troubleshoot any connection issues privately.

During the call, use the Participants panel to mute or remove disruptive attendees. For external users, you can also promote them to presenters by right-clicking their name and selecting Make presenter—just be mindful of who you grant these permissions to.

When the meeting ends, click Leave to exit. Teams will automatically send a recap email to all attendees, including external users, with a link to the meeting recordings (if enabled) and any chat transcripts.

Don't forget to follow up with external users afterward. A quick thank-you email with any action items or next steps keeps the professional relationship strong. You'll love how simple this makes collaboration with outside teams.

Tips & tricks for hosting a smooth Microsoft Teams conference call with external users

These little-known tricks will help you avoid the most common pitfalls when inviting outside participants to your Teams meetings.

Meeting Options Are Your Secret Weapon: In Step 2, take that extra 30 seconds to double-check the "Who can join the meeting?" setting—this is where 90% of permission errors happen. I've seen teams waste hours troubleshooting because they missed this one simple toggle. Also, if you're working with clients who frequently join, consider saving these settings as a custom template for future meetings.

Test Before the Big Day: The 5-10 minutes you spend in Step 4 testing with one external user first will save you from potential disasters. I once hosted a client kickoff where the video kept freezing—turns out their firewall was blocking Teams. Testing early gives you time to troubleshoot without the pressure of the full group watching. This is especially important if you're working with partners who might have different network setups.

Domain Blocking Can Be Your Worst Enemy: If external users aren't receiving invites, don't just assume it's a typo in their email. Many organizations block external meeting invites by default. In Step 3, if you're getting bounce-backs, ask your IT team to add the external domain to your organization's allowed list in the Teams admin center. This is a common oversight that can derail your entire meeting setup.

Lobby Screening Has a Purpose: That "Allow callers to bypass the lobby" toggle in Step 2 exists for a reason—security. Unless you're meeting with very trusted partners, leave it off. I've seen too many cases where uninvited guests joined calls meant for sensitive discussions. The lobby gives you that crucial moment to verify attendees before they join the main meeting.

Frequently asked questions

Got questions about hosting a conference call in Microsoft Teams with external users? You’re not alone! Here are some common concerns—and quick answers—to help you get everything set up smoothly.

Wrapping up and next steps

Setting up a conference call in Microsoft Teams with external users is simpler than you think! By following these steps—from preparing your account to testing the call—you’ll ensure smooth, professional collaboration with anyone outside your organization. 🎉

Now that you’re ready, take the next step: practice with a test call to get comfortable before your big meeting. The more you use Teams, the more seamless your virtual interactions will become. Happy calling! 🚀