Disable Legacy Browser Support
Legacy Browser Support allows visitors with older browsers and operating systems to continue using HTTPS to connect to yor site. If you disable support, these users will experience errors when attempting to establish an SSL/TLS session with your site. Such errors may be obvious and reported by the browser, or they may silently break functionality and be difficult to troubleshoot.
Warning: Disabling Legacy Browser Support will also prevent browsers without Server Name Indication (SNI) support from connecting to your site. Review the list below to determine if you need support for browsers earlier than those listed.
Minimum browser version required when SHA-1 support is disabled (must support SNI):
IE7 on Windows Vista (Windows XP not supported)
Google Chrome on Windows Vista or OS X 10.5.7
Safari 3.0 on Windows Vista or Mac OS X 10.5.6
Moxilla Firefox 2.0
Opera 8.0 (with TLS 1.1 enabled)
BlackBerry 10
Windows Phone 7