Among the options supported are EXPAND which tells the remote directory server to expand any union entries in the directory. By default, the response will contain the names of union links to be included, and the client must submit a new query. A directory server can ignore the EXPAND option to the list command if it so desires. The LEXPAND option is the same as EXPAND, but indicates that the server should only expand union entries for local directories. The LEXPAND option is implied if a multiple component name is being resolved.
The VERIFY option tells the remote server that the purpose of the query is to verify whether the remote directory exists and is a directory. No components are to be returned; instead, the message returned on success is NONE-FOUND.