idp 2.4.1 ecp extension

[MA Lanxin]

Hello,

I have an IDP 2.4.1 server. I need to use idp ecp extension.
My understanding is that ecp extension is included in IDP 2.4.1 by default.
There is the "saml:SAML2ECPProfile" entry in my relying-party.xml

        <rp:ProfileConfiguration xsi:type="saml:SAML2ECPProfile" includeAttributeStatement="true"
                                 assertionLifetime="PT5M" assertionProxyCount="0"
                                 signResponses="never" signAssertions="always"
                                 encryptAssertions="conditional" encryptNameIds="never"
                                 includeConditionsNotBefore="true"/>

I cannot see the line below in my IDP metadata.
<SingleSignOnService Location="https://idp.X.X/idp/profile/SAML2/SOAP/ECP" Binding="urn:oasis:names:tc:SAML:2.0:bindings:SOAP"/>

What should I do else in order to use ecp extension ? Could somebody give me some clue?
I use "username/Password" handler in handler.xml

Thanks a lot,

Regards
Lanxin