2.2.4.30 PidTagTelexNumber

Data type: PtypString ([MS-OXCDATA] section 2.11.1) in an OAB file, PtypMultipleBinary ([MS-OXCDATA] section 2.11.1) when returned from an NSPI server

The PidTagTelexNumber property ([MS-OXPROPS] section 2.1042) contains a mail user's telex number.