Hi,
Did the user set any folder redirection before? Especially the default location it shows when you click File > Open & Export > Open Outlook Data File in Outlook 2013. By default, the location is:
C:\Users\%username%\Documents\Outlook Files
To verify this, we may open the Registry Editor and navigate to:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
Find the Personal value and check if its data is set to other path rather than
%USERPROFILE%\Documents. If this is the case, try changing the value to
%USERPROFILE%\Documents and then test the issue again.
Please let me know the result.
Regards,
Steve Fan
TechNet Community Support