The real question is: why are you using Outlook?
There were workarounds to redirect the mail to Gmail and manage everything from there instead, but they cracked down on them one after another. The last time I didn't manage to avoid it, so now I'm stuck with that piece of crap.
Outlook comes with Windows, it works.
What in some sense has me worried is that even Microsoft doesn't really care about native applications anymore. It's rather hard to take a software company serious, when they don't even want to develop to their own native API. The whole thing is primarily a result of Outlook becoming a blood webapp.
Is there honestly any reason why they couldn't bundle the real Outlook, the one they sell to businesses?