Jul 13 2022 09:37 AM
Jul 31 2022 03:28 PM
Jul 31 2022 03:55 PMSolution
I don't know how many characters you can send to the API call, not sure if that's documented somewhere. What I do know is that Teams will only shows 150 characters from your preview text. This is documented on the page of the API call itself: https://docs.microsoft.com/en-us/graph/api/userteamwork-sendactivitynotification?view=graph-rest-1.0...
Hopefully this answers your question (and thanks for the tag @Christopher Hoard !).