Adaptive Cards in Teams channel messages: fixed narrow width — request for width control
Hi Teams Platform team, We post structured status reports as Adaptive Cards into a Teams channel. The card consistently renders at a fixed width of 448 px on a 1080p display at 100% scaling with a maximized Teams desktop client — well below the available channel message stream width. Wide multi-column tables get truncated or wrapped, which significantly hurts readability. What we've tried No card-level `width` property exists in the Adaptive Cards schema. `msteams.width: "Full"` is documented to apply only to Stageview / task module / tab — silently ignored in channel messages (tested). Same payload via three delivery paths — Incoming Webhook, Logic App "Post adaptive card in chat or channel", and Microsoft Graph `POST /teams/{id}/channels/{id}/messages` — all render at the same narrow fixed width. The constraint is in the Teams channel-message renderer, not in any delivery layer. Minimal repro payload (7-column results table; all field names and values replaced with generic placeholders): { "type": "message", "attachments": [ { "contentType": "application/vnd.microsoft.card.adaptive", "content": { "$schema": "https://adaptivecards.io/schemas/adaptive-card.json", "type": "AdaptiveCard", "version": "1.5", "msteams": { "width": "Full" }, "body": [ { "type": "TextBlock", "text": "Pipeline Report — run-001", "weight": "Bolder", "size": "Medium" }, { "type": "Table", "gridStyle": "accent", "firstRowAsHeaders": true, "columns": [ { "width": 2 }, { "width": 1 }, { "width": 2 }, { "width": 1 }, { "width": 2 }, { "width": 1 }, { "width": 1 } ], "rows": [ { "type": "TableRow", "cells": [ { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "Col-1", "weight": "Bolder", "size": "Small" }] }, { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "Col-2", "weight": "Bolder", "size": "Small" }] }, { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "Col-3", "weight": "Bolder", "size": "Small" }] }, { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "Δ Col-3", "weight": "Bolder", "size": "Small" }] }, { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "Col-4", "weight": "Bolder", "size": "Small" }] }, { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "Δ Col-4", "weight": "Bolder", "size": "Small" }] }, { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "Status", "weight": "Bolder", "size": "Small" }] } ] }, { "type": "TableRow", "cells": [ { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "item-a", "size": "Small" }] }, { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "mode-x", "size": "Small" }] }, { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "0.000/0.000","size": "Small" }] }, { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "+0.00%", "size": "Small", "color": "Good" }] }, { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "0.000/0.000","size": "Small" }] }, { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "-0.00%", "size": "Small", "color": "Attention" }] }, { "type": "TableCell", "items": [{ "type": "TextBlock", "text": "✅ Pass", "size": "Small" }] } ] } ] } ] } } ] } `msteams.width: "Full"` is present but has no visible effect in the channel message context. Feature request Either of: Honor `msteams.width: "Full"` in channel-message context (not just Stageview/task module/tab), OR Add a card-level property (e.g. `msteams.channelWidth: "Full" | "Default"`) explicitly scoped to channel messages. Is this a known limitation with an existing tracking item, or should we also file it on the M365 Feedback Portal for upvotes? Thanks!
Send Messages using Bot/Change Notification in MS Teams
Hi I have some questions regarding bot functionality within Microsoft Teams. I'm developing an app/plug-in to monitor and analyze all incoming messages in chats and channels. The goal is to intercept these messages, check them for specific flagged (e.g., inappropriate) content, and instantly send a notification back to the respective chat or channel if flagged content is detected. I need to achieve this in real time. Currently, I’ve implemented the first half of this functionality using Microsoft Graph’s change notifications API, allowing me to intercept and read messages as they arrive. However, I’m facing a limitation: since my app doesn’t have permissions to post messages, I can't use the Graph API’s send capabilities to notify users within the channels or chats. To work around this, I’m considering utilizing a bot. My approach is to have a bot send these notifications to the appropriate chats and channels, using identifiers such as tenant ID, team ID, channel ID, message ID, and chat ID—information I retrieve through the change notifications API. So here are my main questions: Can I use a bot to send messages to various chats and channels on demand, leveraging the IDs obtained from the change notifications API? This would allow my app to handle message interception while the bot takes over in sending the flagged notifications. In my current setup, is there a way to reply to chats or channels directly using the Graph API's 'send' functionality through the app itself? It is related to Application/Delegation Permissions. Thanks
Teams Adaptive Card Not Opening Custom URI within Channel
I've created a message with a button to call a custom URI which will open a local program, this functionality works in a personal chat directly with the bot. However it does not work within a Teams Channel on the browser or the desktop app, I'd expect it to at least open the browser but it does not even do that. { "type": "Action.OpenUrl", "title": "Open in Outlook", "url": "boof://${$root.Reference}" } This is the JSON I'm using for the button, I'm expecting the "URL" to be "boof://280" for example. Is there a reasoning why this functionality does not work within a channel?
