Does the iOS client still send all of your email through Microsoft?

I have the new Outlook for Mac. On the first day I tried it it would crash instantly because of an email in my mail account without a sender or receiver or body or subject. After a few days of having a useless Microsoft support tech rebuilding the Outlook index 10-15 times and disabling the built in firewall I finally stumbled upon someone online telling me to search for empty emails in my webmail.

After I got Outlook to work again it would only crash 3-5 times a day (logs for one of the days: http://fluffyelephant.com/2015/02/outlook-for-mac-v15-6-is-u... ). It was like that for a few months, now it only crashes a couple of times a week.

And I'm the lucky one. My boss had his Outlook crash on launch after 3 months of using it. Microsoft couldn't even get the data out (calendar, contacts, sent messages) and he had to go back to the old Outlook and Microsoft even messed that up so bad that he could only use the calendar in day mode (not week of month) for a few weeks.

So my suggestions. Apple has started to make shoddy software as of late, they still have a long way down though until they reach the Microsoft level. Even if they hired the shittiest developers for 5 years, I would still choose Apple over Microsoft.