Hi, I am not seeing an attribute for it in any of the documentation [URL] xml file structure  You should be able to set the attribute with racadm Page 263 
I am working on automating our deployment standardization. I am using System Profile xml imports do do this with good results.  One outstanding item I have not been able to manage through an xml import is a setting that is found when booting into the Lifecycle Controller > System Settings > iDRAC Settings > Thermal in the User Options area.  The cooling options come default as set to auto and I need to change this to Fan Speed Offset and set the offset to Low Offset.  I am unable to find an attribute for these settings on a full System Profile export on an R620. Is this a setting that has no attribute and cannot be managed through automation?
System Profile Attribute for iDRAC Settings - Thermal