[Policy] Logging [Value data type] REG_SZ [Description] 
This policy value is used only if logging has not been enabled by the "/L" command-line option or MsiEnableLog. If a policy is set in this case, a log file is created in the temp directory with the random name: MSI*.LOG. Specify the logging mode by setting the policy value to a string of characters. Use the same characters to specify logging mode policy as used by the "/L" command-line option. For more information, see Command Line Options. Note that you cannot use "+" and "*" for the policy.