I am not able to connect my Hotmail ID and Outlook.com ID.

I would like to use my outlook.com ID as default, but I am not able to.

When I try to add my Hotmail ID as "Add an existing email address as a Microsoft account alias"

I get following error "You can't add an alias with the domain hotmail.com. Try an email address that has a different domain."

I was reading some blog and it suggested that now I can add Hotmail with Outlook.