On the stock ROM If I have a forwarded calendar event, you can download it using gmail and it ends up in my google calendar. With ICS (perhaps its the fault of gapps?) I see an attached file (smime.p7m) with INFO under it, but no download link for the event. There appears to be no way to load the event into the calendar. Some relevant background. I am a contractor at a military installation and emails with attachments are automatically digitally signed (exchange DSET). This really shouldn't be a matter of gmail's handling of the digital signature, but I am unsure what it is an issue of Any idea why this works on stock and if there is something out there that makes this work? Edited to clarify.