The Web Conferencing Server failed to send health notifications to the MCU factory at

After patching my Lync 2013 servers to November Updates I started getting flooded with the following errors:

  • LS MCU Infrastructure 61035

You can follow this KB to sort this out:

  • http://support.microsoft.com/kb/2901554/en-us
  • Click Start, type regedit in the Start search box, and then click regedit.exe in the results list.
  • Locate the following registry subkey: HKLM\System\CurrentControlSet\Control\SecurityProviders\Schannel
  • Right-click Schannel, and then click New DWORD (32-bit) value.
    Type EnableSessionTicket, then press Enter.
  • Right-click EnableSessionTicket, and then click Modify.
  • Change the existing value to 2, and then press Enter.
    Exit Registry editor.
  • Open the Lync Server Management Shell.
  • Run the following Lync Server PowerShell commands in the given order:
    Stop-CsWindowsService
    Start-CsWindowsService

After that the errors should be gone.

Hope it helps.