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The invoke locations are compose message area, command bar, and message. Each command defines a type, such as action or search and the locations in the client from where it is invoked. In the app manifest for Microsoft Teams app, a single messaging extension is defined with up to ten different commands. Though you can create the web service manually, use Bot Framework SDK to work with the protocol. The web service takes advantage of the Bot Framework's messaging schema and secure communication protocol, so you must register your web service as a bot in the Bot Framework.
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You want to complete a complex task involving multiple steps or lots of information in an external system, and share the results with a conversation.Ĭreate a bug in your tracking system based on a Teams message, assign that bug to Bob, and send a card to the conversation thread with the bug's details.Ī messaging extension consists of a web service that you host and an app manifest, which defines where your web service is invoked from in the Microsoft Teams client.
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Search for a work item in Azure DevOps, and share it with the group as an Adaptive Card. You want to find something in an external system, and share the results with the conversation. Reserve a resource and allow the channel to know the reserved time slot. You want some external system to do an action and the result of the action to be sent back to your conversation. Scenarios where messaging extensions are used Scenario Microsoft Teams messaging extensions: User authent.Message extensions is no longer supported in the compose box.Getting anonymous thumbnails of SharePoint Online.In this case, it's the groups the current user has joined: After the sign in is completed, the messaging extension is able to show "security trimmed" data from the Graph. The user is prompted to sign in the first time they launch the compose messaging extension. After that, the token flow (including the access tokens and refresh tokens) will be handled by the Bot Framework. The user will have to sign in only once into the app. To see a walk-through of building a messaging extension from scratch, check out Cameron Dwyer's post: įetching data from Microsoft Graph as the current user (delegated authentication) Those are the primary building blocks of a Teams messaging extension (or even a Teams Chat Bot for that matter, but that's out of scope for this post) We need this to get the Bot Id and also to set "Microsoft Teams" as one of the channels served by the bot.Ģ) An endpoint which will receive (and respond to) HTTP POST messages from teams when the messaging extension commands are invoked.ģ) A Teams App Manifest which contains the JSON specifying the messaging extension properties, the Bot Id, and the messaging endpoint.
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The way in which the messaging extensions work is by leveraging the Microsoft Bot Framework and utilising the following moving pieces:ġ) A Bot Channel Registration which is essentially the identity of the Bot/Messaging extension. To know more about messaging extensions, have a look at the Microsoft docs:
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Instead, we will focus more on how they are built and how to authenticate the current user. I won't go much deeper into the different possibilities with messaging extensions in this post. This gives us a great way of creating Teams based integrations with other Line of Business (LOB) applications.