The Registry path that contains entries for the Advanced Server Share Parameters is as follows:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
\AdvancedServer\ShareParameters
KeepAdministrativeShares REG_DWORD 0 or 1
Specifies whether administrators are prevented from removing the ADMIN$ and IPC$ shared resources.
Default: 1 (prevented from removing shared resources)
MakeUnixDirectoriesOnShare REG_DWORD 0 or 1
When creating a new share using Server Manager, specifies whether the Advanced Server should create a directory automatically if one does not exist.
Default: 1 (create new directory)
ShareCacheCount REG_DWORD 5 - infinity
The number of share names to store in the sharefile cache.
Default: 40
ShareReadCount REG_DWORD 1 - infinity
The number of share entries to read during sharefile operations. Setting this value greater than 1 causes the server to read ahead SHAREENTRY structures from the sharefile.
Default: 10