3.2.4.1.2 wsa:MessageID
The WS-Management Protocol, as specified in [DMTF-DSP0226], endorses two different MessageID URI formats, as specified in [DMTF-DSP0226] section 5.4.4.
Web Services Management Protocol Extensions for Windows Server 2003 clients MUST use only the uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx MessageID format.