I don’t want to provide my AD credentials. Can I still use bounSky?

Yes!

The Lync / SfB client will cache your credentials if you sign in once through the client and check the “save my password” box.

In bounSky you can setup this account with a blank (empty) password. When you click (or use the shortcut keys) to sign-in to that site, bounSky passes your SIP address and username and the client does the rest.