I am using Cisco Jabber version 9.0.2 (in Windows 7). Connection Settings :
Server type : Cisco WebEx
Login server : Use the default server
After I enter my account and sign in, Cisco Jabber notifies "Invalid username and password". But I still connect properly with this account by using Cisco Webex connect.
Any body know why?
I have no way of checking the webex server name you need.
You can try and open a support case with webex and they should be able to help.
Jabber for windows requires to enter username with domain e.g. if your username is "abc" and domain is "example.com", then you should enter "email@example.com" as username. If you are entering username in this format and login is failing then please open support case as Colin suggested.