All your contacts are present in Mail, so you can manage them from a single place. Right-click on a person's name and select "Edit contact" to see more ways of getting in touch with them.
T IS WROING WITH YOU PEOPLE??
When I try to log-on to my Inbox it takes ages to find it.
When I am in my e-mail account it is worse than treacle.
COME ON - SORT IT OUT this was supposed to be an improvement