How to change the labels of composition fileds in Dynamics 365

 How to change the labels of composition fileds in Dynamics 365

Below JS could be your reference.

ChangeAddress1CompositeLabels: function (executionContext)

    {

        var formContext = executionContext.getFormContext();

        var fieldStreet1 = formContext.getControl("address1_composite_compositionLinkControl_address1_line1");

        var fieldStreet2 = formContext.getControl("address1_composite_compositionLinkControl_address1_line2");

        var fieldStreet3 = formContext.getControl("address1_composite_compositionLinkControl_address1_line3");

        var fieldCity    = formContext.getControl("address1_composite_compositionLinkControl_address1_city");

        var fieldStProv  = formContext.getControl("address1_composite_compositionLinkControl_address1_stateorprovince");

        var fieldPostalCode = formContext.getControl("address1_composite_compositionLinkControl_address1_postalcode");

        var fieldCountry = formContext.getControl("address1_composite_compositionLinkControl_address1_country");

       

        if (fieldStreet1 != null) fieldStreet1.setLabel("Street 1");

        if (fieldStreet2 != null) fieldStreet2.setLabel("Street 2");

        if (fieldStreet3 != null) fieldStreet3.setLabel("Street 3");

        if (fieldCity != null) fieldCity.setLabel("City");

        if (fieldStProv != null) fieldStProv.setLabel("State/Province");

        if (fieldPostalCode != null) fieldPostalCode.setLabel("Postal Code");

        if (fieldCountry != null) fieldCountry.setLabel("Country/Region");      

    }