To avoid constant Sametime (Notes imbedded) prompts in the Notes client asking for the password, i activated the SSO option in the user Préférences and its much better.
I read here (http://www-01.ibm.com/support/docview.wss?uid=swg21098572
) that "A Sametime or Notes instant messaging user's password is the same as the user's Internet password".
Curiously, an Internet password change has no consequence on the users's sametime. No prompt and the ST client still connects to the ST server.
If a manually remove the Internet pwd in te user's personnal document, the ST client continues to work. Marvelous !
Is the sync reserved to the "real" ST clients and not a limited use ST server ?