I couldn't find much useful information on opening a CFEXCHANGE
connection to Office365. After some playing around I got it to work. I am posting this here for informational purposes as it might be useful for others.
Because of the need to specify serverversion="2010"
this will only work on CF10.
To establish a connection use the following code:
<cfexchangeConnection
action="open"
username ="#emailAddressForOffice365User#"
password="#passwordForOffice365User#"
server="outlook.office365.com"
protocol="https"
connection="myExchangeConnection"
serverversion="2010">
The Office365 account I connected to had the settings which were set when it was created (i.e. I did not have to change any account settings for this to work).