January will be the last month Microsoft will provide updates for any Internet Explorer version other than Internet Explorer 11. Even Internet Explorer 10 will no longer be supported after January patch Tuesday (January 12th, 2016).
See the following URL for details –
Update Dec 9 10:30 a.m.
According to the table in the URL below, it seems like they will support IE9 on Vista and Server 2008 until the OS support is discontinued.