When configuring Windows Live Mail for Office 365 Hosted Exchange you need to be aware that Calendars, Contacts and Tasks won’t sync – this is for email using IMAP only.
Click on Accounts and then Choose Email
Enter Your Email address, Password and Display name – Click Next
Server Type – IMAP
Server Address – outlook.office365.com, Port 993
Authenticate Using – Clear Text
Logon Username – Your email address
Outgoing Server Address – smtp.office365.com, Port 25, Requires SSL and Authentication to be checked