Isn't your comment then very specifiy for that installation of yours? When you use MS Teams in a "normal" O365 environment, then every feature you described for IRC is possible with weebhooks and the cards API. Simple CURL based integration.
Re:Simplicity of IRC
by 41b696ef1113 on Sunday January 09, 2022 @02:38PM
(#29866606)
I will second with another anecdote at mega corporation - Teams is entirely locked down and any of the useful integration points are disabled.
At any rate, for the IRC server at the shop I was at previously, I had "webhook" support/a http(s)->irc gateway implemented on my own in much less than an hour via CGI ;)