Kerberos: several have kerberos sections, see https://msdn.microsoft.com/en-us/library/mt712797.aspx, for more details under the kerberos section.
Located in the folder:
C:\Program Files\Microsoft SQL Server\MSSQL13.MSSQLSERVER\MSSQL\Binn\Polybase\
Located in the folder: C:\Program Files\Microsoft SQL Server\MSSQL13.MSSQLSERVER\ MSSQL\Binn\Polybase\hadoop\conf
we had these additional files. It is unclear
Earlier CTP releases:
For CTP 2.2, most, perhaps all of these may never need to be changed.
These are located in the folder:
C:\Program Files\Microsoft SQL Server\MSSQL13.MSSQLSERVER\MSSQL\Binn\Polybase\Settings\.
HadoopUserNameLocated in Hadoop.config file, the setting HadoopUserName has a default of pdw_user.
<setting name="HadoopUserName" serializeAs="String">
We did not have to change this value, but we were using the fairly open Hortonworks Sandbox with the user Hue. However, this value does seem to be a setting used by HDInsight. Until additional documentation is released, if you are have having connection issues, this might be a setting you want to consider updating. Thanks to Hilmar Buchta for pointing out this hidden user name setting.