1. Create the MPSSharePointAccts group if not already created.
2. Add the MPSPrivAcct user to the MPSSharePointAccts group.
3. Set 'ExecuteAs' on CreateSite_ , DeleteSite_, CreateSubSite_, DeleteSubSite_, AddRole_, RemoveRole_, AddGroupToRole_, RemoveGroupFromRole_, AddUsersToRole_, RemoveUsersFromRole_, GetIste_, ModifySiteQuota_ to the MPSPrivAcct.

Impersonate Caller.

<request>
  <procedure>
	<execute namespace="ManagedSharePoint2007" procedure="InitializeNamespaceSecurity" impersonate="1">
				<executeData>
						<org>LDAP://ou=alpineskihouse,ou=consolidatedmessenger,ou=hosting,dc=fabrikam,dc=com</org>
						<preferredDomainController>ad01-wh.fabrikam.com</preferredDomainController>
				</executeData>
		</execute>
  </procedure>
</request>

• Hosted Messaging and Collaboration version 4.5
• Hosted Messaging and Collaboration version 4.0
• Windows-based Hosting version 4.5