SBS 2011 intermittent connection issue? RRS feed

  • Question

  • Hello Guys,

    Our SBS 2011 server is experiencing an intermittent connection issue. It seems to be losing its network connection intermittently. This server was also our Exchange server and DNS server so whenever it loses connection, other servers lose their internet connection as well and we got disconnected to Outlook too. We are using Outlook anywhere by the way. We’ve been monitoring the server via continues PING and whenever we get a series of timed-out response from the server, we are checking the event viewer once we got our access back to see what event(s) is/are causing this. Unfortunately, we are not getting unique events for timed-out responses. On Windows Logs (Application and System view), these error events are showing.

    Event ID: 10009

    Source: DistributedCOM

    Description: DCOM was unable to communicate with the computer machine.domain.local using any of the configured protocols.

    Event ID: 12016

    Source: MSExchangeTransport

    Description: There is no valid SMTP Transport Layer Security (TLS) certificate for the FQDN of The existing certificate for that FQDN has expired. The continued use of that FQDN will cause mail flow problems. A new certificate that contains the FQDN of should be installed on this server as soon as possible. You can create a new certificate by using the New-ExchangeCertificate task.

    However, these events don’t seem to be the culprit since Event 10009 refers to an old DNS entry while 12016 talks about an expired certificate. Do you guys have any idea what could be causing this intermittent connection issue?

    By the way, the SBS 2011 server is a guest VM in VMware ESXi version 4.1.0. All other guest servers are connected to the

    same virtual switch on the same host.

    Thank You,


    • Edited by Noctis0791 Wednesday, January 8, 2014 9:18 PM Spacing is not working
    Wednesday, January 8, 2014 9:12 PM

All replies

  • Did this recently start?

    Just off the top of my head, was it after an install of .net 4.5.1?

    Unfortunately TechNet isn't coming back, sorry folks :-(

    Wednesday, January 8, 2014 11:58 PM
  • Hi Susan,

    Based on our records this seems to have started on 01/02/2014 around 5:00 am even before we installed the updates for .Net Framework 4.

    Thank You,


    Thursday, January 9, 2014 2:07 PM