1. disable for all web services:
in D:\Apache Software Foundation\Tomcat 7.0_PRAS\webapps\ws\WEB-INF\conf\axis2.xml
<parameter name="exposeServiceMetadata">true</parameter>
2. disable for certain web service:
D:\Apache Software Foundation\Tomcat 7.0_PRAS\webapps\ws\WEB-INF\services\adcc\META-INF\services.xml
<service>
<parameter name="exposeServiceMetadata">true</parameter>
</service>