Windows Messenger Settings
For Presence/Buddylist
(Messenger Version 5.1.0680)
Accounts Settings (Tools->Options->Accounts Tab)

Accounts-Advanced Settings
(Tools->Options->Accounts->Advanced Button)

Note: Replace 192.168.1.102
with the IP address or hostname of your SIP server. Replace the port
number 5060 above if your server is not using the default SIP port
assignment.
Resulting Presence Display
The above setup pages are for user amit, shown on the left. User becky,
at right (on another computer), has equivalent settings.
