As explained in SA83, when using IWA-BCAAA or WinSSO, BCAAA uses the settings provided by Windows for SSL/TLS connections.
BCAAA does not have an option to select the SSL version. Therefore, to disable SSLv3, you will need to disable SSLv3 on the Windows server for the Server Software.

Workaround

To disable SSLv3 on the Windows server where the BCAAA agent is installed, read Microsoft Security Advisory 3009008. Follow the steps in "Disable SSL 3.0 in Windows For Server Software"