Teams meetings are best when you join them from the Teams app or Teams on the web, and there's a bunch of ways to do that—read on for details about joining by link, from your calendar, and more. If you can't use the app or the web, some meetings let you call in using a phone number.
Join by link
All you need to join a Teams meeting is a link.
Select Click here to join the meeting in your meeting invite to be taken to a page where you can choose to either join on the web or download the desktop app. If you already have the Teams app, the meeting will open there automatically.
If you don’t have a Teams account and the organizer has allowed it, you may have the option to enter your name to join the meeting as a guest. If you do have a Teams account, select Sign in to join with access to the meeting chat and more. Then, depending on the organizer’s settings, you may join the meeting right away or go to the lobby where people in the meeting can admit you.
Join from calendar
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Select Calendar on the left side of Teams to view your meetings.
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Find the meeting you want and select Join.
Or, if someone starts the meeting, you'll get a notification you can use to join.
Join in a channel
If a meeting takes place in a channel, you’ll see an invitation to join, relevant content, and who’s in the meeting right in the channel. Just select Join.
Join from chat
If the meeting has already begun, it appears in your recent chat list. Select the meeting in your chat list and then select Join at the top of the chat.
Call in
If you're unable to use the Teams app or Teams on the web, you can join some meetings by calling a phone number.
If there's a phone number and conference ID in the meeting invite, just dial the number to join.
The number in your invitation may not be local to you. Select Find a local number to get one that is.
Add a room while you join
When you’re choosing your audio and video settings, you have the option to add a room so you can use a meeting room’s audio and video devices. Your personal device may even detect a nearby room using Bluetooth. If it does, you’ll see the meeting room’s name and the option to Join and add this room. If the nearby room has already joined the meeting, you can Join with audio off to avoid disrupting the meeting.
If your device doesn’t detect the room nearby, select Add a room under Other join options and search for the room you’re using.
Join by link
To get the best of Teams meetings on mobile, including audio, video, and content sharing, you’ll need to download and install the Teams mobile app.
If you have the app, select Click here to join the meeting in the meeting invite to open the app and join the meeting. If you don’t have the app, you’ll be taken to the app store where you can download it.
Note: Try to download the app before the meeting starts. It might take a minute or two, depending on your internet connection.
If you don’t have a Teams account, select Join as a guest and enter your name to join the meeting as a guest. Depending on how the meeting was set up, you may need to sign in to an account that was authorized for the meeting.
If you have a Teams account, select Sign in and join to join with access to the meeting chat and more. Depending on the organizer’s settings, you may join the meeting right away or go to the lobby where someone else can admit you.
Join from calendar
Select Calendar 
on the bottom of the app to see your meetings. Find the meeting you want, and then select Join.
Join from a notification
When a Teams meeting starts, you’ll get a notification that’ll bring you directly to the meeting without finding it on your calendar. Just tap the notification to join.
Note: For now, this is only available on iOS. Coming soon to Android!
Join in a channel
If a meeting takes place in a channel, you’ll see an invitation to join, relevant content, and the organizer right in the channel. Just select Join.
Join from chat
If the meeting or meeting chat has already begun, it appears in your recent chat list. Select the meeting in your chat list and then select Join at the top of the chat.
Dial in
Some meetings let you join by dialing a phone number if you're unable to use the Teams app.
If there's a phone number in the meeting invite, select it to dial the number and the conference ID. Once you're connected, dial 1 to join the meeting.
If you see a number in the invite but it's not local to you, select Find a local number to get one that works for you.
Join on multiple devices
Join a meeting on more than one device for more collaboration and content-sharing options. If you're already in a meeting on your laptop, for example, you can join on your phone as well to share live video, control a presentation with your phone, and much more.
When you've joined a meeting on one device, open Teams on your mobile phone. (Make sure both devices are signed in to the same Teams account.)
You’ll see a message at the top of your mobile screen with an option to join the meeting on this device. Tap Join to share content from your phone with everyone in the meeting.
If you join this way, we'll mute your phone's speaker and mic to avoid causing an echo effect.
The articles below give you a step by step guide on how to share content in a meeting and joining a meeting without a Teams account.