Getting the SMS Unique Identifier Value For a Client
When you discover system resource data for an SMS client, you must specify the client's SMS Unique Identifier value in the DDR, such as:
DDRAddString("SMS Unique Identifier", "GUID:12345678-1234-1234-1234-123456789012", 64, ADDPROP_GUID | ADDPROP_KEY);
The client's SMS Unique Identifier value for a client is located in the system registry at:
HKEY_LOCAL_MACHINE\Software\Microsoft\SMS\Client\Configuration\Client Properties