After outlook.com account is migrated to the new server, Outlook 2010, 2007, 2003 users need to remove the Outlook Connector account and add the account back to Outlook.
The New Outlook.com and the Outlook Connector
After Outlook.com mailboxes move to the new server, the Outlook connector stops working.
First look: Outlook.com on Office 365
Microsoft started moving Outlook.com users to the Office 365 interface earlier this week. Learn about the features and changes you can expect to see when your account is moved.
Blocked Senders List in Outlook.com
How do I access the blocked sender list in outlook.com. It's in Outlook.com's Options > Safe and Blocked Senders. (Screenshots available)
Outlook.com is moving to Office 365!
The big news for anyone who uses Outlook.com for email, or to sync calendar and contacts to smartphone: Outlook.com is moving to the Office 365 infrastructure in 2015.
Export from Outlook Calendar to Outlook.com’s Calendar
How to export a calendar from Outlook and import it into Outlook.com's calendar.
Using Outlook.com Aliases in Outlook
In Outlook.com, you can select the "From" account, while in Outlook, all mail is sent from the default Outlook.com address. Outlook won't send new mail using the alias.
Setting up an Outlook.com IMAP account
How to configure an Outlook.com IMAP account in Outlook. Once configured, you can use it to upload mail to the Outlook.com servers.
Insert Attachments in Outlook.com email
How to insert attachments into email messages at Outlook.com.
How to CC or BCC a message in Outlook on the web
How to CC or BCC a message in Outlook.com: click on the word CC or BCC to the right of the Address field to switch to the BCC and CC field.