The caller must be at least a member of role: DomainAdmin.

<executeData>
		<preferredDomainController>1..1</preferredDomainController>
		<oabCASPool>1..1</oabCASPool>
		<isDefault>0..1</isDefault>
		<poolTag>0..1</poolTag>
</executeData>

<executeData>1..1 </executeData>

<request>
  <data>
	<!--The domain controller to use for Active Directory actions.-->
	<preferredDomainController>AD01.Fabrikam.Com</preferredDomainController>
	<!--Name of the OABCASPool.-->
	<oabCASPool>CasOABPool001</oabCASPool>
	<!--Specify whether to mark this pool as default pool.-->
	<isDefault>true</isDefault>
	<!--A free form text representing the pool.-->
	<poolTag>Non HA</poolTag>
  </data>
  <procedure>
	<execute namespace="Managed Email 2007" procedure="ModifyOABCASPool" impersonate="1">
	<before source="data" sourcePath="preferredDomainController" destination="executeData" mode="move" />
	<before source="data" sourcePath="oabCASPool" destination="executeData" mode="move" />
	<before source="data" sourcePath="isDefault" destination="executeData" mode="move" />
	<before source="data" sourcePath="poolTag" destination="executeData" mode="move" />
	<after source="executeData" destination="data" mode="merge" />
	</execute>
  </procedure>
</request>

• Hosted Messaging and Collaboration version 4.5