<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=497874) </details> <!--IssueSummary end--> [Integrations: Microsoft Teams notifications](https://docs.gitlab.com/ee/user/project/integrations/microsoft_teams.html) Hi, support team, As we tested, the default flow doesn't work when we create a webhook with Workflows in a channel based on the Microsoft official document.  But it did work if we tested it with [Postman](https://www.postman.com/): 1. Test the Adaptive Card using Postman to send a POST request to the URL, created to set up Incoming Webhook. Paste the JSON file in the body of the request and view the Adaptive Card message in Teams. https://learn.microsoft.com/en-us/connectors/teams/?tabs=text1%2Cdotnet#microsoft-teams-webhook FYI, Microsoft Teams is decommissioning the old Incoming Webhooks: [Retirement of Office 365 connectors within Microsoft Teams](https://devblogs.microsoft.com/microsoft365dev/retirement-of-office-365-connectors-within-microsoft-teams/) Do you think the problem is on GitLab side? Thanks a lot! <!-- Don't edit below this line -->