WORKAROUND
Update the ObjectClass value to be only 'USER' or 'GROUP', as the case may be, for the objects that require deprovisioning via Manager. E.g.:
UPDATE ADSAccount
SET ObjectClass = 'USER'
WHERE UID_ADSAccount = ‘d70cd584-7b95-460e-953c-e39e8549753e’
STATUS
This will be addressed in service pack 2 for version 7, i.e. 7.0.2.