Add passive outgoing webhook support
Currently in Teams, there is an ability to create a webhook, but this must be actively called each time (via @webhookname).
There should be an option to have a webhook that fires on each comment in a channel without any requirement on behalf of the user to explicitly type anything extra.
This will enable stronger interactions with external systems (e.g. external comment feed) that doesn't depend on user input.
This, like other webhook functionality in Teams, makes the whole scenario very limited