Jabber settings are different depending on client.
For instance, some clients, like Digsby, ask for:
In this instance, your username would be firstname.lastname@example.org and your password
would your s.ms password.
Some clients require more settings. For instance:
In this instance, your username would be email@example.com
your password would your s.ms password,
the server would be s.ms
and resource is a location
indicator, such as Home or Work.