Exodus account dialog doesnt have Server field in it. There is jabber ID field. You have to enter username@servername or username@server_IP here.
This KB doc http://www.jivesoftware.org/community/entry.jspa?externalID=452&categoryID=22 is about adding contacts, but is the same for logining.
If you have specified server name as ibm so you should enter username@ibm in Jabber ID field. But, this server name should be resolvable (known) by network/internet computers you are trying to login from. These are achieved with DNS records. In local network you can edit hosts file in every computer manually also. Resolving means retrieving real IP address of server out of specified name.
The simpliest way is of course specifying IP of the server. So as example you would use firstname.lastname@example.org. Or better, Specify username@ibm and on the next tab (“Connection”) uncheck “Automaticly discover host and port” and put 192.168.12.41 in host field. This is as i do in my local network, because we dont have DNS and i dont want to edit hosts files manually on every PC.
If you dont use shared groups and your clients will be adding contacts to their rosters manually they will have to use IP too. And this doesnt look nice. So if you dont have DNS you would probably want to edit their hosts files. In Windows XP yiu can find it in C:\Windows\system32\drivers\etc
in every client’'s PC hosts file.
So, then that PC will know what the real address stands for “ibm”.
P.S. 192.168.12.41 is just an example, you should find out IP address of PC you have installed Wildfire on. And sorry if i went to far in details