Custom OVF Property in my Virtual appliance

I'm trying to create an additional property in my VM that I build with VMware Studio so that I can use OVFTool to pass a value for the property when I deploy the VM to a vCenter.

The property looks like that shown in red.  But when I invoke OVFTool to give a value to this property, what am I supposed to be using? 

Something like this I can't get to work:

    ovftool  <...>  --prop.ConfigurationManagementServer.My_VM_Name= 10.1.2.3   <..>

Thanks for any hints,

CJ

        <Section xsi:type="vadk:IpAssignmentSection_Type">

                <Info>Supported IP assignment schemes</Info>

                <vmw:IpAssignmentSection ovf:required="false" vmw:protocols="IPv4,IPv6" vmw:schemes="">

                        <Info>Supported IP assignment schemes</Info>

                </vmw:IpAssignmentSection>

        </Section>

        <Section xsi:type="vadk:PropertySection_Type">

                <Info/>

                <Property ovf:key="ConfigurationManagementServer" ovf:type="string" ovf:userConfigurable="true" ovf:value="puppet" ovf:qualifiers="MinLen(0),MaxLen(65535)">

                        <Label>Configuration Management Server (Optional)</Label>

                        <Description>Your configuration management server&apos;s fully-qualified name (e.g. config.avamar.com ). Blank if none.</Description>

                </Property>

        </Section>

        <Section xsi:type="vadk:AnyOVFSection_Type">

                <Info>

            Unknown OVF elements in this element will be passed directly

            to the OVF output descriptor without interpretation

        </Info>

        </Section>

        <Section xsi:type="vadk:UpdateSection_Type">

                <Info/>

                <vadk:Repository vadk:url="" vadk:username="" vadk:password="" vadk:passwordFormat="base64"/>