How to include button to channel tab in an adaptive card

jlincroft -

To include a button in an adaptive card that opens a channel tab, you can use a deep link that targets the specific channel tab. The format you mentioned is correct, but it needs to be adjusted to point to the channel tab instead of a personal tab.
Use the following format to create a deep link to the channel tab:

https://teams.microsoft.com/l/entity/{appId}/{entityId}?webUrl={webUrl}&label={label}

• {appId}: The app ID of the tab.
• {entityId}: The entity ID of the tab.
• {webUrl}: The URL of the tab content.
• {label}: The label for the button.

Example:

https://teams.microsoft.com/l/entity/fe4a8eba-2a31-4737-8e33-e5fae6fee194/tasklist123?webUrl=https://tasklist.example.com/123/456&label=Task 456&context={"subEntityId": "task456","channelId": "19:cbe3683f25094106b826c9cada3afbe0@thread.skype"}

Ref Doc: https://learn.microsoft.com/en-us/microsoftteams/platform/concepts/build-and-test/deep-link-application?tabs=teamsjs-v2#share-deep-link-for-a-tab:~:text=Link%20to%20a%20task%20item%20within%20the%20configurable,context%3D%7B%22subEntityId%22%3A%20%22task456%22%2C%22channelId%22%3A%20%2219%3Acbe3683f25094106b826c9cada3afbe0%40thread.skype%22%7D

Thanks, 

Nivedipa

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