If I use the old "Post to Teams Channel" action, I can wrap a url in the <a href="http://blahblah">Click here</a> html code, but I cannot @ a user using the new <at>email@example.com</at>
So I am using the posting as a flow bot. It does the @ correctly, but the HTML is ignored and it just posts the URL as an unclickable length of text. Even if I am using dynamic data from a Power BI connector, which provides a Tile URL, even that gets expanded into 3-4 lines of text.
Have you checked the Formatting text content in the Microsof Teams API documentation? Specifically the Examples of text formatting, which mentions hyperlink formatting:
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I added it as an idea here with the tag bug. This seems to be a bug given it converts dynamic content urls added to a flow to plain text. Please vote for it. If there is another place to post about bugs, please let me know.
I assume Microsoft have fixed it because adding the link with the <a href=""....etc in the flow now creates a clickable link in the Teams channel for me.
Thnk you @Brad_Groux
This worked for me.
However we will need to put it in the Text Box of the JSON like this:
I was able to create the link as illustrated and now have a direct link to a new Planner task. I used concat to build the url to the Planner task.
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