I used to be able to click the attachment and say open in and choose PowerPoint from the native iOS mail app. I am no longer able to do that now. office is not an option I can only use the internal iOS preview. Any ideas what the issue is?
update on this. I fixed it. I uninstalled everything. Didn't work. Turns out to be some weird MDM thing from my work. They started offering o365 for free so downloading the same app from the corporate App Store but not iTunes got it working. Odd