I have recently migrated from Exchange 2003 to Exchange 2010. When I run the EMS I enter 'Remove-MailboxPermission -Identity USER1 -User USER2 -AccessRights FullAccess -InheritanceType All'. I get the response 'WARNING: Can't remove the access control entry on the object "CN=LASTNAME\, FIRSTNAME,OU=Users,OU=CITY,OU=COMPANY,DC=XXXXXX,DC=local" for account "XXXXXX\USER2" because the ACE doesn't exist on the object'.
IN the EMC it doesn't show the full access permission, but in the EMS it does show th user; the user does actually have access.
How do I remove this user? Any help at all will be greatly appreciated.