Метод 1. Можно воспользоваться двумя утилитами из Windows 2003 Resource Kit: permcopy.exe, srvcheck
c:\Program Files\Resource Kit>permcopy /?
Copies the permissions (ACLS) from one share to another.
PERMCOPY \\SourceServer ShareName \\DestinationServer ShareName
c:\Program Files\Resource Kit>srvcheck /?
Displays a list of server shares and who has access.
SRVCHECK \\ComputerName

Метод 2. net share "имя шары"="диск:\путь к каталогу" /grant:[имена юзеров|everyone],full