Event ID: 3005 MSExchange Front End HTTP Proxy

Among other issues (starting to lose confidence in this product already), I am getting this.

This is Exchange 2007 and Exchange 2013 CU2 co-exsistance. All mailboxes migrated to 2013, except for Public Folders (which fail to migrate due to separate issue) eevrything is on 2013 CU2. 

I am not sure why it keeps referring to 2010.

Log Name:      Application
Source:        MSExchange Front End HTTP Proxy
Date:          12/09/2013 3:52:39 PM
Event ID:      3005
Task Category: Core
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      EXCAHNGE2013contoso.com
Description:
[RpcHttp] Marking ClientAccess 2010 server exchange 2007.contoso.com (https://exchange2007.constoso.com/rpc/rpcproxy.dll) as unhealthy due to exception: System.Net.WebException: The underlying connection was closed: The connection was closed unexpectedly.
   at System.Net.HttpWebRequest.GetResponse()
   at Microsoft.Exchange.HttpProxy.ProtocolPingStrategyBase.Ping(Uri url)

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Ramu V Ramanan