Hi, according to http://jbws.dyndns.org/mediawiki/index.php?title=FAQ#Customizing_WSDL_Sch... the only possibility you have is to use javax.xml.bind.annotation.* annotations. Your object GetBillingAccountRequest must be JAXB de/serializable. However aforementioned annotations don't contain MinOccurs annotation, see: http://java.sun.com/javaee/5/docs/api/javax/xml/bind/annotation/package-t... Try to ask JAXB forum how to solve your problem. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4132407#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...