当尝试运行 Microsoft Windows 2000 Server 的计算机上运行
setup /forestprep 命令时，安装程序可能不起作用并且可能出现以下错误信息：
Prerequisites for Microsoft Exchange Domain Preparation failed:
The component "Microsoft Exchange Forest Preparation" cannot be assigned the action "Install" because:
- Either you do not have permission to update the Active Directory schema or Active Directory service is currently too busy.
即使您有更新架构的适当权限，也会出现此错误信息。
Exchange 2000 Setup.log 文件可能包含类似以下内容的项：
[22:49:00] Entering ScGetSchemaVersion
[22:49:00] About to create the dob for object
/dc=com/dc=domain/cn=Configuration/cn=Schema/cn=ms-Exch-Schema-Version-Pt
[22:49:00] Leaving ScGetSchemaVersion
[22:49:19] fNeedToUpdateRegistry
(K:\admin\src\libs\exsetup\exmisc.cxx:2224)
Error code 0XC0070035 (53):The network path was not found.
[22:49:38] ScSetSchemaUpdateKey
(K:\admin\src\libs\exsetup\exmisc.cxx:1554)
Error code 0XC0070035 (53):The network path was not found.
[22:49:38] ScImportActiveDSSchemaChanges
(K:\admin\src\libs\exsetup\exmisc.cxx:1366)
Error code 0XC0070035 (53):The network path was not found.
[22:49:38] ScCanUserUpgradeSchema
(K:\admin\src\libs\exsetup\exmisc.cxx:1593)
Error code 0XC0070035 (53):The network path was not found.
这些日志项中的重要信息是“The network path was not found”（找不到网络路径）错误信息。
如果远程注册表服务未运行，可能会发生此问题。要想进行正确安装，Exchange 2000 Server 和 Exchange Server 2003 必须具有远程访问注册表的权限，即使正在本地安装 Exchange。
当您试图在远程注册表服务已停止的情况下在 Windows 2000 Server 计算机上安装 Microsoft Exchange Server 5.5 版时，也会出现本文“症状”部分中所描述的症状。有关其他信息，请单击下面的文章编号，以查看 Microsoft 知识库中相应的文章：
247407 (http://support.microsoft.com/kb/247407/EN-US/) XADM:Error Message Installing Exchange Server on a Computer Running Windows 2000 Server
