2.2.5.13 PidNameAutomaticSpeechRecognitionData Property
Type: PtypBinary ([MS-OXCDATA] section 2.11.1)
The PidNameAutomaticSpeechRecognitionData property ([MS-OXPROPS] section 2.375) contains the automated text transcription of the attached voice message.
Further details on the format of this property are specified in section 2.2.2.5.