adprep32.exe /forestprep 报错，哪位大侠能帮忙下，谢谢。

C:\>d:\support\adprep\adprep32.exe /forestprep

ADPREP WARNING:

Before running adprep, all Windows 2000 Active Directory Domain Controllers in t
he forest should be upgraded to Windows 2000 Service Pack 4 (SP4) or later.

[User Action]
If ALL your existing Windows 2000 Active Directory Domain Controllers meet this
requirement, type C and then press ENTER to continue. Otherwise, type any other
key and press ENTER to quit.

c
Adprep was unable to extend the schema.
[Status/Consequence]
The schema master did not complete a replication cycle after the last reboot. Th
e schema master must complete at least one replication cycle before the schema c
an be extended.
[User Action]
Verify that the schema master is connected to the network and can communicate wi
th other Active Directory Domain Controllers. Use the Sites and Services snap-i
n to replicate between the schema operations master and at least one replication
partner. After replication has succeeded, run adprep again.

本来是想EXCHANG2003迁移EXCHANG2010，在迁移AD时报了以上错误。

您好！
1.从exchange2007升级到exchange2010,
adprep /forestprep应该在架构主控上运行。有关具体的步骤您可以百度下面：
Upgrade
from Exchange 2007 to Exchange 2010
2.使用DCdiag检查DC是否正常，repadmin检查AD复制及使用netdiag检查网络是否正常。
3.另外，查看应用程序日志中有无报错信息。

任务占坑