Exchange 2003 and 2007 cannot exchange mail

If you have created the routing group connector using the Management Shell and you are still unable to route mail between exchange 2003 and exchange 2007, you may find the permission inheritance on the exchange 2003 servers has been disabled.

To correct this, you will first of all need to enable the security tab in exchange 2003 system manager.

http://support.microsoft.com/default.aspx/kb/264733


1. Start Registry Editor (Regedt32.exe).
2. Locate the following key in the registry:
HKEY_CURRENT_USER\Software\Microsoft\Exchange\EXAdmin
3. On the Edit menu, click Add Value, and then add the following registry value:
Value Name: ShowSecurityPageData Type: REG_DWORDRadix: BinaryValue: 1

Once this is done, open Exchange System Manager, navigate to each server in turn and edit the properties. On the security tab, click advanced. Tick the "Allow inheritable permission from the parent ... " check box. Click OK twice.

Incidently, if you run the Best Practices Analyser that come with exchange 2007, and choose the 2007 readiness check, it will report this as a problem area if permission inheritance is not enabled.