Mike,
It has Never been done and will never be done or supported.
The installation requires Oracle 12c. All of the scripts and processes to populate the DB are all dependent on it.
I am former Vontu/Symantec and it has been this way sice day 1, because Oracle was more secure (encryption etc.) than MSSQL at the time. In addition the amount of work to re-write the application and procedure calls would take forever.
It will never be supported..
Good Luck
Ronak
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