I feel your pain. I've been putting up with that shit as a user and support for years now. My company is in the middle of migrating to Outlook. I've never been so happy rolling out a Microsoft product.
It's like IBM wanted to share their pain with the world.
Still, you think it's terrible now, it could be worse, you could have to navigate the impenetrable maze that is Lotus Domino. It makes me want to punch myself in the balls.
Wow, people still use Lotus Notes?
Some massive companies still use it. HSBC use it globally (migrated from Outlook about 7 years ago) and Goodyear also use it.