Created canvas app and created Microsoft 365 subscription trail, I have followed the below URL for reference https://www.youtube.com/watch?v=4iKAgJQiJZI . After hitting the start button, corresponding mailbox rendering in browser but while opening the message not able to see the add-in, am I missing any settings? any help is appreciated.
MessageRead.html - introduced iframe MessageRead.js :- document ready loading the canvas app in I frame.
Addin should display in outlook but not as well as no error. am I missing any setting?