I personally would prepare the presentation using OOo. Then save it
out as .ppt powerpoint format. Then it can be read by the MS software
with no trouble. This is what I do at work and I have not had any
trouble. You can test this yourself using MS-Powerpoint before doing
the final submission. If you need to do any adaption such as for
fonts you can do it then. But I have not had any font trouble going
that direction and I would not expect you to either. You might want
the msttcorefonts installer to use the MS fonts. (I don't know of any
free fonts. Any suggestions from the net?)