The format of the webhook in MS Teams is https://outlook.office.com/webhook/{groupId}@{tenantId}/IncomingWebhook/{connectorId}/{webHookId}
Unlikes slack, MSTeams cannot send a notification with to the channel name but needs a webhook
You can get this from MS Teams -> go to team name -> channel name -> connectors and click on configure.
Reference and Further reading: https://aws.amazon.com/premiumsupport/knowledge-center/sns-lambda-webhooks-chime-slack-teams/
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