如果不允许匿名搜索，那么输入管理员的标识名和密码。
If anonymous searches are not allowed, enter an Administrator's distinguished name and password.
如果线程创建时没有指定标识名，就会为其生成一个新名称。
If a name is not specified when a thread is created, a new name is generated for it.
输入基准标识名(Base distinguished name)，即所有用户常见的最特定的后缀。
Enter the Base distinguished name, the most specific suffix common to all users.
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