Ok, I have my flow creating a FeedItem record but I can't get the @mention to work properly. I am posting to a Chatter Group so I can't use the ParentID field and the related to field is referencing a WorkThanks record.
In the body of the post I have this formula: {!varMessage} & '@[' + {!WhoToThank} + ']'
WhoToThank is the ID of the user.
I assume it has something to do with my formula syntax but I don't know how to fix it.
Any ideas?