Exchange 2013 Fatal Alert Code 70: The protocol version the client attempted to negotiate is recognized

I have an Exchange 2013 Server and within the System Event Log get an error every 20-30 seconds.

The definition is Fatal Alert Code 70: The protocol version the client attempted to negotiate is recognized, but not supported. For example, old protocol versions might be avoided for security reasons. This message is always fatal.

Log Name:      System
Source:        Schannel
Date:          18/06/2015 09:51:02
Event ID:      36887
Task Category: None
Level:         Error
User:          SYSTEM
A fatal alert was received from the remote endpoint. The TLS protocol defined fatal alert code is 70.
Event Xml:
<Event xmlns="">
    <Provider Name="Schannel" Guid="{1F678132-5938-4686-9FDC-C8FF68F15C85}" />
    <TimeCreated SystemTime="2015-06-18T08:51:02.561526800Z" />
    <Correlation />
    <Execution ProcessID="712" ThreadID="17456" />
    <Security UserID="S-1-5-18" />
    <Data Name="AlertDesc">70</Data>

We have a number of TLS secured SMTP connections which we have gone through one by one and disabled but these errors didn't stop.

Has anyone else had a similar problem.
Daniel GradwellAsked:
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AmitIT ArchitectCommented:
Ya, I see this on my server too. I called MS and they said to ignore it.

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