Endpoint Protection

I have two SEPM 14 Servers running on Windows Server 2008 R2 Boxes, and SEP Clients 12.1.6 MP6 running on Windows Server 2003，SEP Client 14 running on Windows 7 and Windows Server 2008 R2, all clients use https  has connected to SEPM 14 Server normally.

After SEPM 14 MP1 has been released , I upgrade my SEPM 14 Boxes to SEPM 14 MP1, the SEP client 14 running on Windows 7 or Windows Server 2008 R2 connected to SEPM 14 MP1 Server nroamlly, auto upgrading ok, but the SEP Client 12.1.6 MP6 on Windows Server 2003 lost connection to SEPM 14 MP1 Server , I used symdiag to diagnose , it say communication between Server and Client may not  start , https data format error ....

Any thoughts greatly appreciated.
Many Thanks

I found why.....

SEP 14 MP1 change the secure channel so Windows Server 2003 must apply KB948963 patch to add

• TLS_RSA_WITH_AES_128_CBC_SHA AES128-SHA
• TLS_RSA_WITH_AES_256_CBC_SHA AES256-SHA

After apply this patch the connection restored

But Windows XP do not have this patch, Any suggestion to XP ? Many thanks

I found Why .....

SEPM 14 MP1 changed https secure channel, so Widnows Server 2003 must apply KB948963. After this , the  connection restored.

But , Windows XP do not have KB948963, so any suggestion to XP?

Many thanks

SEP 14 does not support Windows XP. It needs to remain on 12.1