New method Export to Excel is introduced in update Roll up 4 of CRM 2013 SP 1 that can reduce the hassle of bulk update, you don’t need to maintain 2 different fields, one for creation then another one for update, with those in different format (XML and CSV) you don’t need to convert your XLSX file anymore since it can be read by CRM.
It is great future for those who often do the data migration and bulk update, previous version did not allow us to import XLSX file and we must maintain the XML File in order to update back to CRM, it was kind of risky and troublesome action to maintain bigger size file and have to do import twice.
Now with the new feature CRM can detect either UPDATE existing record or INSERT new record, combined as UPSERT Method that indeed is newly introduced in the in Update Roll up 4 of MS CRM 2013 SP1.
but I can't find a way of disabling/removing the addition of the three "hidden" columns while export - I want a nice flat file, no hidden columns or headers. Is there any workaround for that still?