Earlier I went the PDF way, but there is a much, much easier way inside PowerPoint: create a Doc handout.
In PowerPoint, select >Export, then >Create Handouts:
Then select Layout, with or without notes:
I don't want to include my personal notes and I don't like the "blank lines", which are annoying underlines that are useful for printout, but clog online annotation.
So, select the 2nd or 4th option, depending on legibility of the slides (best served by "Blank lines below slides"), and do a Replace All in MS Word. Find what [_] and Replace with [blank space]:
Voila ...