Topic Last Modified: 2005-11-17

The Microsoft® Exchange Server Analyzer Tool reads the following registry entry on each domain controller:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\CurrentVersion\CurrentVersion

If the Exchange Server Analyzer cannot read this registry value for any reason, the Exchange Server Analyzer displays an error.

To correct this error
  1. Make sure that the domain controller has been started and is connected to the network.

  2. Use the PING command to see if the domain controller is reachable.

  3. If there is a firewall, check to see if RPC ports are blocked.

  4. Make sure that the Remote Registry service on the domain controller has been started.

  5. Examine the permissions for the account under which the Exchange Server Analyzer is running. The account under which the Exchange Server Analyzer is running must have Administrator permissions on each domain controller that it is scanning.

For more information about troubleshooting network connectivity problems, see the following:

For more information about port requirements, see the Knowledge Base article 832017, "Service overview and network port requirements for the Windows Server system" (