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App Validation failing for no clear reason
We're trying to get our (very simple) Teams App listed on the app store, but during the App Validation we keep getting the same error: "Unable to upload the manifest.zip file in MS Teams." as seen below: Downloading the report doesn't give any more information, it only lists the only successful validation step ("BotID should be registered") and the error doesn't appear there. I've validated the manifest.json file against the schema, tried reuploading the same manifest to a different org (creating a new app and bot) - validation fails there too. Does anyone have any pointers? Here is my (anonymized) manifest file: { "$schema": "https://developer.microsoft.com/en-us/json-schemas/teams/v1.19/MicrosoftTeams.schema.json", "manifestVersion": "1.19", "version": "1.1.1", "id": "[redacted]", "developer": { "name": "[redacted]", "websiteUrl": "https://www.[redacted].com", "privacyUrl": "[redacted]", "termsOfUseUrl": "[redacted]" }, "icons": { "color": "color.png", "outline": "outline.png" }, "name": { "short": "[redacted]", "full": "[redacted]" }, "description": { "short": "[redacted]", "full": "[redacted]" }, "accentColor": "#4A3AFF", "bots": [ { "botId": "[redacted]", "scopes": ["personal"], "supportsFiles": false, "isNotificationOnly": false, "commandLists": [ { "scopes": ["personal"], "commands": [ { "title": "help", "description": "Show what this bot does and how to connect your account" }, { "title": "connect", "description": "Get a fresh link to (re-)connect your account" } ] } ] } ], "staticTabs": [ { "entityId": "conversations", "scopes": ["personal"] }, { "entityId": "about", "scopes": ["personal"] } ], "permissions": ["identity", "messageTeamMembers"], "validDomains": ["app.[redacted].com", "auth.[redacted].com"] }
TeamsTab.ReadWriteSelfForTeam: deleting a tab fails with 400 "appId cannot be null or whitespace"
We have a published Teams app that pins a configurable tab into a team channel via Microsoft Graph and removes it again when the user uninstalls our app from that channel. Creating the tab works. Deleting it always fails with a 400 that looks like an unhandled null-argument exception inside the Graph Teams service rather than a permission problem. I reported this in October 2025 as https://github.com/MicrosoftDocs/msteams-docs/issues/13432, but that is a documentation repository and the issue has had no response, so I am reposting here, as we can still reproduce the issue. We're using a delegated token for the operation. The only tab-related scopes are `TeamsTab.Read.All` (read-only) and `TeamsTab.ReadWriteSelfForTeam`. According to the docs (https://learn.microsoft.com/en-us/graph/api/channel-delete-tabs), `TeamsTab.ReadWriteSelfForTeam` is the **least privileged** delegated permission for the delete, so the token should be ok. What works Creating the tab, with the same delegated user token: POST https://graph.microsoft.com/v1.0/teams/«teamId»/channels/«channelId»/tabs Content-Type: application/json { "displayName": "«AppName»", "email address removed for privacy reasons": "https://graph.microsoft.com/v1.0/appCatalogs/teamsApps/«teamsAppId»", "configuration": { "entityId": "«entityId»", "contentUrl": "https://«ourhost»/teams/tabs/channel/«entityId»", "websiteUrl": "https://«ourhost»/app/tickets?channel=«entityId»", "removeUrl": "https://«ourhost»/teams/remove-tab/«entityId»" } } → `201 Created`. The tab appears in the channel and renders correctly. Listing the tabs afterwards also works and returns our tab together with its `id`: GET https://graph.microsoft.com/v1.0/teams/«teamId»/channels/«channelId»/tabs?$expand=teamsApp Works as well and lists our tab. Might be served by the TeamsTab.Read.All permission. What fails DELETE https://graph.microsoft.com/v1.0/teams/«teamId»/channels/«channelId»/tabs/«tabId» → `400 Bad Request` { "error":{ "code":"BadRequest", "message":"appId cannot be null or whitespace. (Parameter 'appId')", "innerError":{ "date":"2026-07-27T13:45:31", "request-id":"f930c847-0b48-4a46-b17e-f0ee10ff8177", "client-request-id":"f930c847-0b48-4a46-b17e-f0ee10ff8177" } } } (leaving in the error details, maybe that helps diagnosing the issue) appID is not even part of the request, it's probably resolved against the TeamsTab.ReadWriteSelfForTeam permission on your side. Let me know if you need any more details.
CS agent OK in M365 Copilot; Teams chat silent / no Studio session
We are troubleshooting a Copilot Studio agent that works correctly in Microsoft 365 Copilot and in the Copilot Studio test surface, but does not receive inbound activities from Microsoft Teams personal chat. Environment and evidence: - Agent: Copilot Studio agent (custom business assistant) - Copilot Studio agent ID: 88901b10-… (truncated) - Teams/Entra app ID: 7e4a53cc-… (truncated) - Manifest version: 1.0.8 - Channel configuration: Microsoft 365 Copilot + Microsoft Teams - Publish: Succeeded / Channel state: Synchronized - Agent Registry: Available - Authentication: Integrated / Tool credentials: Maker-provided - MCP/custom connector runtime: working (Studio tool test HTTP 200) - Microsoft 365 Copilot routing: working Failure specific to Teams: - Messages in Teams web and desktop appear delivered in the agent personal chat - Agent never replies - Studio monitor has M365 Copilot sessions, but no Teams session for those timestamps - Teams Admin Center Manage apps returns 0 results by name or exact app ID despite Agent Registry Available - Intentionally not republishing / reconnecting OAuth / rewiring connectors because M365 Copilot path proves the same agent+connection works Classification: FAIL — Teams inbound activity is not reaching the Copilot Studio agent. Questions focused on Teams delivery: 1. Why would Teams personal 1:1 messages never create a Studio conversation while M365 Copilot does? 2. Is a missing TAC Manage apps row expected under Unified App Management when Registry shows Available? 3. Known gaps: Agent Registry Available + channel Synchronized, but Teams client chat bound to a non-runtime endpoint? 4. Best diagnostic if Monitor shows 0 Teams sessions after a confirmed client send? Looking for production experience / documented workaround. Redacted evidence available; no tokens/secrets.
[Adaptive Card] Issue with CodeBlock line numbers and more
I have a simple adaptive card containing a code block with multiline SQL in it: from botbuilder.core import CardFactory, MessageFactory, TurnContext async def send_sql_card(context: TurnContext): SQL_QUERY = """SELECT order_date, customer_id, SUM(quantity * unit_price) AS revenue FROM catalog.sales.order_items WHERE order_date >= DATE '2026-01-01' AND order_date < DATE '2026-06-01' GROUP BY order_date, customer_id """ activity = MessageFactory.attachment( attachment=CardFactory.adaptive_card( { "type": "AdaptiveCard", "$schema": "http://adaptivecards.io/schemas/adaptive-card.json", "version": "1.6", "msteams": {"width": "full"}, "body": [ { "type": "CodeBlock", "codeSnippet": SQL_QUERY, "language": "sql", }, ], } ) ) await context.send_activity(activity) This worked fine until maybe a few weeks ago. Now, there are two issues: Line numbers appear twice: Not all lines are being shown: It says "Expand (11 lines)", but it only shows 9. This happens on Teams Desktop - it looks fine on the web version.Migrating Teams Calling Bot (EchoBot) from VMSS to Windows Containers / ACI?
Hi everyone, I have built a Microsoft Teams Calling Bot using Application-Hosted Media based on the official C# EchoBot sample: https://github.com/microsoftgraph/microsoft-graph-comms-samples/tree/master/Samples/PublicSamples/EchoBot Currently, our signaling logic is fully serverless and runs efficiently on Azure Functions. However, the actual media processing (using the C# Calling SDK which relies on native Windows media binaries) is deployed on VMSS with Windows Server, just like the repository's default deployment guide suggests. Running these Windows VMs continuously is becoming extremely expensive, and we are looking for a cheaper, modern, or "on-demand" alternative to handle the media pipeline. Since raw audio processing strictly requires these native Windows-based Media binaries, I would like to ask the community: 1. Windows Containers (ACI / AKS): Has anyone successfully run this C# EchoBot/Media SDK inside Windows Containers (such as Azure Container Instances or AKS)? If so, how do you handle the public IP and port-binding requirements for the media sockets (since the platform needs direct public connectivity for UDP/TCP traffic)? 2. On-Demand Provisioning: Are there any known architectures or best practices for spinning up the media processor only when a call starts (e.g., triggering an ACI instance via the Azure Function signaling bot) and tearing it down afterwards to keep costs near zero when idle? 3. Alternative Approaches: If you have solved this high-infrastructure cost problem for a real-time raw audio bot in production, what architecture did you end up using? Any documentation, GitHub references, or architectural advice would be highly appreciated! Thanks!Can same-tenant meeting bots be routed through lobby approval like external bots?
Hello! As far as I understand, external third-party meeting bots are now detected by Teams and routed to the lobby via RequireApprovalWhenDetected; the organizer must admit them. Same-tenant bots bypass this entirely. Is there currently a way to apply lobby approval to same-tenant bots so it does not appear as a participant until explicitly let into the room? If not, is this on the roadmap? Could for example be a per-app flag on the Entra app registration or a Graph API parameter on the join call. All the best, HaraldMicrosoft Teams API Capabilities
Good morning, We are contacting you to find out whether it is possible to achieve the following functionalities through the Microsoft Teams API: Start a scheduled meeting automatically Through a voice command, a meeting scheduled in a room's calendar is automatically started, and all the necessary equipment and services are activated without any user intervention. Automatically answer an incoming call in a meeting room When a call is placed to a specific account, the room automatically answers the call without requiring any user action. Add participants to an ongoing call or meeting Allows new attendees to be added to an active meeting or call in progress. Thank you in advance for your assistance. Kind regards,Issue Sideloading Word Extension into Word Online via GoDaddy M365 Account
Hi everyone, We’re currently facing an issue while trying to sideload a Word extension into Word Online. From what we understand, the standard process is to upload the add-in through the Microsoft 365 Admin Center, after which users within the organisation can access it through the “Add-ins” section in Word Online. However, our organisation’s Microsoft 365 account was purchased through GoDaddy instead of directly from Microsoft. Because of this, attempts to access certain Microsoft 365 Admin Center features appear to get redirected to the GoDaddy Admin Center instead. We suspect this may be preventing us from accessing the required deployment/app management options needed for sideloading the extension. Has anyone faced a similar issue with GoDaddy-managed Microsoft 365 accounts? Any guidance or workaround suggestions would be greatly appreciated. Thanks in advance.
