The FSA task report file will show the following when set to Full on Reports tab of the task:
*** Error *** - Error making file: \\?\UNC\fileserver.evlocal.com\E$\Filles\SomeFile.docx a placeholder file. No such interface supported
This issue is caused by a inconsistency in the encryption types allowed by the EV server and File Server target.
Ensure that the following key is consistent on both the EV server and Windows File server: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters\SupportedEncryptionTypes
For more information on this key please refer to this Microsoft article.