Sarah, you are not the only office with this issue. Regarding emailing of protected files from SV, it is a real problem and SV has not yet found solution. I have found that if I open the file with Adobe, make a minor change (I highlight a number) and then save the file, it works.  I do the change and saving of the file right in the Connected Desktop.  It takes just a few seconds per file. Not idea....but it's the easiest method I've found so far.