Hi techsaavy, I'm Raoul, the project leader of OpenLP.
Office 365 is not presently supported by OpenLP. Most of the developers don't use Windows, and of those that do, they don't have access to Office 365. Office 2012 is not supported, for the same reason. We have heard of some of our users successfully using PowerPoint 2012, but as I said before we have not been able to test it ourselves.
If you wish to use presentations you will need to use one of our supported applications. I personally recommend LibreOffice as a candidate which is most compatible with PowerPoint presentations.
If you want to control your presentation remotely from your phone while using OpenLP you will need to use the OpenLP remote (it's in the Play Store). If you wish to use your remote app, then you cannot use OpenLP - you will have to run your presentation externally.