SEP 11.x Client Update to 12.1.6 client

Hi All,

           Quick question as usual. I am making sure that all our servers are now on the same version of SEP client so it will be the very latest 12.1.6 MP1a version. I have some older servers that are still on SEP 11.0.6200.754 client. The OS's are:-

Windows Server 2003 family Standard Edition

Windows Server 2003 Family Enterprise Edition

Will my current 12.1.6 client install upgrade these in the usual way? Does anyone know of any problems?

Thanks

PaulC