United Kingdomi'm on right now, in pennsylvania. It may be a regional outage. Where are you located?
... and after 11 hours it's just popped back up for me too.It's just come back up for me.
Been down since 05:19 this morning and unable to access via activesync (mobile and outlook) or via the web.
Loads of people posting about it on Microsoft forums
answers dot Microsoft dot com slash en_us slash outlook_com