There is a very interesting article that deals with the automatic provisionning of Sametime Proxy servers settings through a link (URL) or the scan of a QR Code...
This document is available following this link http://www-10.lotus.com/ldd/stwiki.nsf/dx/configuring_sametime_for_mobile_users_st852ifr1
I tried it and it works perfectly on iOS but not on Androids...
I'm using Android 4.0.4 ICS.
Apparently the launch of an app on Android is not possible through a command like sametime://...
Is there anybody who knows how to call an app on Android with a link?