B. Environment Variables : II_UUID_MAC (Windows)
 
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II_UUID_MAC (Windows)
II_UUID_MAC, when set to TRUE, uses an older algorithm for generating UUIDs on Windows.
For security reasons, the uuid_create function on Windows no longer uses a machine's MAC address to generate UUIDs. You can use the II_UUID_MAC environment variable if you do not need the level of security provided by the new uuid_create algorithm and for the sake of compatibility want to continue to use the MAC address of your machine when creating UUIDs.