hello there,
check out this section:

Enhanced Notifications
If you don't use Hotmail, you can choose to be notified whenever a new e-mail arrives in your POP3 mail account (up to five can be configured!). Additionally, you can receive toast-style notifications for any contact event, like when contacts their nick or go offline.

there's something missing there, "...like when contacts their nick or go offline."
it should be "when contacts change their nick"

it's just a detail, but still important to report