Some browsers, such as Internet Explorer 11, Safari, and Firefox, support the Microsoft Teams web app but don't support some of the Teams calling and meeting features. To work around this limitation, the Teams web app lets users receive audio through a PSTN connection and lets them view presented content (screen share) at a reduced display rate.


Oct 12, 2018 If using Chrome, go into Settings then Notifications. Under the Block list, find teams.microsoft.com. Click on the right arrow to the right of it (looks like the 'play' symbol). Scroll down until you see 'Notifications' and change it to 'Allow'. You may have to go into Windows - Settings - Notifications and ensure Chrome is set to allow too. Microsoft Teams, the hub for team collaboration in Microsoft 365, integrates the people, content, and tools your team needs to be more engaged and effective. The methods below apply to both the Desktop and Web apps. Press Command+Period (.). Press Command+E to go to the Search field, type /keys, and then press Return. Select the (Settings and more) button in the upper-right corner of Microsoft Teams on Mac, and then select Keyboard shortcuts.

Microsoft 365 apps and services will not support Internet Explorer 11 starting August 17, 2021 (Microsoft Teams will not support Internet Explorer 11 earlier, starting November 30, 2020). Learn more. Please note that Internet Explorer 11 will remain a supported browser. Internet Explorer 11 is a component of the Windows operating system and follows the Lifecycle Policy for the product on which it is installed.

When Teams detects an unsupported browser, it automatically displays a message explaining the issue and the session limitations. The message provides further instructions for accessing the meeting audio, such as advising the user to leave a call back number so that Teams can call the user, or instructing the user to call the conference number included in the meeting invitation. The message also encourages the user to download and use the Teams desktop client for the full Teams experience.


If PSTN is unavailable, the user won't see the instructions for accessing the meeting and won't be able to join the meeting.


Ms Teams Web Page

Browser limitations

People who use the Teams web app on unsupported browsers will experience the following limitations:

  • Audio is available through a PSTN connection only. Users can't use their microphone.
  • Users can't share their camera or see other participants' videos but can view presented content through image-based screen sharing.
  • Users can't share their screen, although they can see a screen that another meeting participant shares.
  • Users can't take control during a screen sharing session.
  • Users won't receive incoming call notifications.
  • If the call is interrupted, the meeting won't automatically reconnect.
  • Users can't start meetings.

For more information about browser support in Teams, see Limits and specifications for Teams.


Related topics


Microsoft Teams is the ultimate hub for teamwork and intelligent communications.Built on the strength and scale of Microsoft 365 with over 120 million users,Microsoft Teams delivers chat-based collaboration, meetings, calling, and enterprise voice features.

Why integrate with Microsoft Teams?

Automate team lifecycles

Use Microsoft Graph to create a new virtual team when a new business issue arises,add the right people to the team,and configure the team withchannels,tabs,and apps.If you want to get the new team together to discuss the business issue,add a new event to the team calendar.

When the business issue is resolved and you no longer need the team,use the Microsoft Teams API to archiveor delete the team.If you know the maximum duration of the team when you create it,set an Microsoft 365 group expiration policyfor the team that automatically removes the team according to the policy.

Get work done even when no one is around

Use application permissions to work withteams, channels, andtabswithout human intervention.Create a new channel when your customer files an order.Automatically create teams for classes at the beginning of the school year, and archive them at the end.

Ms teams web client

Create teams linked to your app

Let customers create new teams and channels.Install yourTeams app in the new teams.Pin your app to a tab in the new channel.Send messages to the channel linking back to your website.

Create and manage multiple teams and channels

Microsoft Graph makes it easy to create large numbers of teams and populate them with users and channels,by automate creating and managing teams, channels,tabs, and apps.Microsoft Graph also lets you findand archivethe teams you are no longer using.This is the same API that the Microsoft Teams Admin Centerand Teams PowerShell commandlets are built on.

Deploy apps to teams

List the teams in your tenant,and install apps to them.Create tabs in channels to give users easy access to apps.

Use Microsoft Graph in any kind of app

Microsoft Teams apps give work groups a new tool to make collaboration a more productive and compelling experience. These apps let work group users share assets, interact through chat, and schedule events on the team calendar. These apps can also automate creating teams, channels, and conversations, enhancing the value of Microsoft Teams.

You can create web sites, services, and native platform applications that run outside the Microsoft Teams user experience, and call the Teams API to automate Teams scenarios.

Types of apps enabled for Microsoft Teams

These collaboration tools include Microsoft Graph-enabled tabs or bots running inside Microsoft Teams apps. You can also call Microsoft Graph outside of a Microsoft Teams app, such as from a website or a web service. If you've already enabled your website for Microsoft Graph, you can use that work for Microsoft Teams by using the Microsoft Teams developer platform to create a tab that uses the existing website code.

Ms Teams Web App

Microsoft Teams APIs can enhance apps inside and outside of Teams:

App typeScenario description
TabsSurface your content in Microsoft Teams.
BotsHelp users get tasks done in conversations.
ConnectorsPost updates from external services to channels.
Actionable messagingAdd enhanced interaction to your connector cards.
Messaging extensionsAllow users to query and share information in conversations.
WebsitesSurface enhanced content in your web pages.
ServicesEnhance your client applications with Microsoft Graph data via your web service.
Activity feedEngage users via feed notifications.
Calling and online meetings (preview)Create Microsoft Teams apps with bots that can initiate and participate in audio/video calls, route/transfer calls based on interactive voice response (IVR) flows, and participate in online meetings.

Get notified about changes

Microsoft Teams supports subscribing to changes (create, update, and delete) to messages in channels and chats to allow apps to get near-instant updates. For details about how to subscribe to changes, see Get change notifications for messages in channels and chats.

API reference

Ms Teams Web Page

Looking for the API reference for this service?

Ms Teams Webmail

See the Teams API in Microsoft Graph.

Next steps

Ms Teams Webinar

  • Watch the overview video.
  • Learn how to use the Microsoft Teams API.
  • Drill down on the methods, properties, and relationships of the team, channel, and group resources.
  • Try the API in the Graph Explorer.
  • Read more about the Microsoft Teams programming model.
  • Explore the cloud communications APIs.
  • Get a jump-start with sample code: Contoso Airlines, C# mini-samples
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