Which one of the following is incorrect about the Huawei Oceanstor 9000 CIFS share configuration...

After Notify is enabled, a client’s change operation in a directory cannot be accessed by other users who are accessing this directory and its parent.

Directory client awareness

When oplock (Opportunistic locking) is enabled, the file will be cached locally before being sent to the shared storage, which is helpful

To improve client access efficiency

After Guest is checked, users do not need to enter a user name and password when accessing the shared directory on the client

After the mandatory signature is checked, the client will be forced to use the signature function. If the client is not set to start state, then Oceanstor9000 will reject the client's data access request