By default it sets this directory to the location of the CSE Clients (Version Control Client in this case) to 'C:\program files (x86)\CA\Gen85\Client' which is the location of the clients. This location can be changed on-the-fly when writing the report. Their is a way to change the default location for each users workstation that contains the CSE Clients. To do this, modified the CSE Client Icon properties for "Start in" to %userprofile% or a specific location where the user has write access...and when the user attempts to write a migrate/adopt report, it will show the directory specified within the icon 'Start In' location.
This can be done for any of the CSE Clients.