Example XML Request
<request>
<procedure>
<execute namespace="Managed Plans" procedure="CreatePlanCategory" impersonate="1">
<executeData>
<preferredDomainController>ad01.fabrikam.com</preferredDomainController>
<categoryDescription>Exchange Hosting Service Plans</categoryDescription>
<categoryName>WbhHosting</categoryName>
</executeData>
</execute>
</procedure>
</request>