You can use either the IExchangeFolderACLs interface or the IExchangeModifyTable interface to add, delete, and edit members of an access control list (ACL).
The IExchangeFolderACLs interface is built on the IExchangeModifyTable interface. It is the preferred interface because it is specifically designed to simplify the task of working with ACLs. To get a pointer to this interface, call the HrFolderACLsOpen function on the folder to which the ACLs apply. This interface contains the following methods:
An ACL is a MAPI table, which means it can be accessed through the IExchangeModifyTable interface. To obtain IExchangeModifyTable, call the IMAPIProp::OpenProperty method on any property of type PT_OBJECT. This interface contains the following methods:
IExchangeModifyTable::GetLastError
IExchangeModifyTable::GetTable
IExchangeModifyTable::ModifyTable
For general information on ACLs, see About Access Control Lists.