@eykf, I never tried to send messages from NiFi to MS Teams but upon reading the documentation, I am not quite sure you need a Webhook URL at all. MS Teams provides the Graph API to be able to integrate MS Teams into external application: https://learn.microsoft.com/en-us/graph/api/resources/teams-api-overview?view=graph-rest-1.0 Now, assuming that you have the channel and the users already created, my first guess is that you would need only to send the message so basically all you have to do is create the API POST as described in the following link: https://learn.microsoft.com/en-us/graph/api/chatmessage-post?view=graph-rest-1.0&tabs=http And here are the parameters in case you need a more complex message, than the one described in the above link: https://learn.microsoft.com/en-us/graph/api/resources/chatmessage?view=graph-rest-1.0
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