Last week, I got an interesting requirement from the Architect to check the possibility to host the provider hosted app in the on-premise server and use the same in SharePoint Online. I hope many of you interested to do the same setup without Azure. If you are one among them, please go through the very detailed article written by Eric Shupps.
I have the STS trust setup for the hybrid search in my environment. So i used the same certificate to host my sample app in O365. Please feel free to get in touch with me if you have any queries on this.
To troubleshoot different issues related to certificate, the following article helped me a lot
Thank you Eric Shupps and Rainier van Slingerlandt for sharing your experience.