Removing Inherited Mailbox Permission; IsInherited = True, Deny = True from query.

Hi All,

We are on Exchange 2010 SP3 UR9.
We are trying to clean up some inherited permissions for mailboxes and was successful doing this using ADSIEdit.

However, when we query the mailbox permission we still see an output for inherited permssions, but the deny is set to true.
Does anyone know how to remove these 'dummy' residual inherited permission from the ems query.

Example.

Identity    | User                 | AccessRights | IsInherited | Deny
--------    | ----                 | ------------ | ----------- | ----
JohnDoeUser | ABC.local\some.admin | {FullAccess} | True        | True

Thank you,
NC