The procedure AllocateOrganization finds and allocates the
resources that an organization is permitted to use. This includes
the resources used for private mailboxes and public folders owned
by the organization. This call attempts to minimize the number of
separate mail stores allocated to an organization whenever that is
convenient. This procedure will fail if there is insufficient room
in the system for the requested new storage, or if any explicitly
requested mail store is unavailable.
If explicit mail stores are not supplied, the list of mail
stores used will be returned in <sourceMailStores>.