I've been using Google Apps for years. Now I am thinking about switching to Outlook.com/Office 365. Note: I am not and won't be using Outlook for Windows.
The one feature I find invaluable with GMail is "Reply from the same address the message was sent to". The only thing I do to set this up is in Settings->Accounts I need to add an alias email. Easy enough.
I don't have to do anything else. When I reply, the From: address is automatically set to the address the email was sent to. Great!
Does Microsoft in Office 365 (I'm not interested in Outlook for Windows, I wouldn't use that) offer the same feature without having to go through a complicated setup or hack?