Archived:DM Adapters and MfE issue (Known Issue)
The Mail for Exchange (MfE) Device Management (DM) adapter may not produce desired results when trying to modify MfE settings.
While it is possible to construct an MfE adapter and read values from the MfE management tree, it is not possible to modify the values using the DM adapter. Either an unspecified error or KErrPermissionDenied is returned by the adapter, regardless of the client application's capabilities.
Updating to the latest version of Mail for Exchange solves the problem. This has been tested for work with MfE 2.9.158 for the Nokia E71.