The main properties

There are only three known user properties:

MSNPROFILE - A bitmapped number indicating some basic user profile information. See below.
NICK - Read only. Stores the nickname of the user, and is the same as their actual nickname.
PUID - Read only. Stores the profile ID for the user. During MSN's operation, this ID could be prepended with "http://chat.msn.com/profile.msnw?epuid=" to get a URI to the target user's profile.

MSNPROFILE definition

There are four bits used to define the MSNPROFILE property, listed here least significant first.

1. User has a profile.
2. User identifies as male.
3. User identifies as female.
4. User profile has a photo.

There were only 7 supported combinations, each with a matching profile status indicator included the JOIN and 353 messages for display on the user list.

ID	Status	Profile	Male	Female	Photo
0	RX/G	No	No	No	No
1	PX	Yes	No	No	No
3	MX	Yes	Yes	No	No
5	FX	Yes	No	Yes	No
9	PY	Yes	No	No	Yes
11	MY	Yes	Yes	No	Yes
13	FY	Yes	No	Yes	Yes

The G status indicator was used for Guest users, as by definition they could not have an actual profile, whereas a normal user with no profile received the RX status.