...
<PriceProvider>
<CustomPriceProvider save-external-order-to-server-database="true" delete-old-trace-log-after-number-of-folder="30" trace-folder="F:\Signifikant\Log\DometicXml\" delete-old-trace-log-after-number-of-folder="60" impersonation="true" domain="localhost" user-name="xyz" password="xyz" />
</PriceProvider>
...