While attemping to use "Exchange Processing Wizard" to process an Exchange server the following error maybe encountered within the EPW.log file.
"InternalError -2147217777 Cannot expand 'Public Folders'. Cannot enumerate HTTP folder. Unauthorized(401)"
In this particular case the server was protected by RSA encryption.
RSA involves a public key and private key. The public key it is used to encrypt messages. Messages encrypted using the public key can only be decrypted with the private key. "Exchange processing Wizard" is not equipped to handle the encryption algorithms for operation.