我在一台电脑上安装Exchange Server 2000时,系统提示:<br>
The domain "Ark-Les.net" has been identified as an insecure domain for mail-enabled groups with hidden DL membersip. Hidden DL Membership will be exposed to members of the built-in "Pre-Windows 2000 Compatible Access" security group. This group may have been populated during the promotion of the domain with the intent of allowing permissions to be compatible with pre-Windows 2000 servers and application. To secure<br>
to domain,remove any unnecessary members form this group.<br>
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请高手指导一下,究竟是什么原因<br>