It is always recommended to run EXBPA tool for checking the exchange 2007 readiness.
This tool will check the prerequisite for installing the Exchange 2007. If you have exchange 2003 in the existing organization which is having more then one routing group then suppress the link state information. This parameter is essential if you plan to create multiple connectors to the dedicated Exchange 2007 routing group.
Reason: In earlier versions of Exchange, when a target server was unreachable, the down connector state was propagated throughout the Exchange organization by link state updates, and an> Inorder to set the registry follow the below step:
1. Open Registry Editor.
2. Locate HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\RESvc\Parameters.
3. Right-click Parameters and select New | DWORD value. Name the new DWORD value SuppressStateChanges.
4. Double-click SuppressStateChanges.
5. In the Value data field, enter 1.
6. Close Registry Editor and then restart the Simple Mail Transfer Protocol (SMTP) service, the Microsoft Exchange Routing Engine service, and the Microsoft Exchange MTA Stacks services for the change to take effect.
Note: You have to do it on each exchange 2000\2003 server if you have more then one routing group connector.
http://technet.microsoft.com/en-us/library/aa996728.aspx
http://technet.microsoft.com/en-us/library/ee338574(EXCHG.80).aspx
扩展Schema
Setup.com /preparelegacyexchangepermissions,
Setup.com /prepareSchema
Open Registry editor, go to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeFBPublish\Par
ameters\
servername
In Edit menu, click Add Value, in the Value Name field type
FreeBusyQuerySessions
Set the Data Type to REG_DWORD and click OK.
In the Data field, type 00000000, click OK.
Close the registry editor.
Restart System Attendant service.
,if error again , reboot the system via exchange 2003 , DC