GitLab Status Microsoft Teams subscription webhook payload does not match required adaptive card schema
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Summary
The same as Issue 471344, Microsoft is retiring the old O365 connectors is Teams, and requiring users to migrate to Power Automate Workflows. Messages posted using the old connectors are currently being accompanied by the following message:
Action Required: O365 connectors within Teams will be deprecated and notifications from this service will stop. Learn more about the timing and how the Workflows app provides a more flexible and secure experience. If you want to continue receiving these types of messages, you can use a workflow to post messages from a webhook request.
I don't have a good way of testing if the new Workflows webhook will work with the old payload, but based on the problems with the Microsoft Teams Integration, I'm assuming it won't.
A new Microsoft Teams webhook subscription may need to be added to support the new Workflows schema using AdaptiveCards.