Topology load generated transient exception %1. EdgeSync must be able to acquire current Exchange topology data from the Active Directory directory service to properly operate. The Edge Transport server will attempt to load the topology again.

Details
Product: Exchange
Event ID: 1026
Source: MSExchange EdgeSync
Version: 8.0
Symbolic Name: EdgeTopologyExceptionTransient
Message: Topology load generated transient exception %1. EdgeSync must be able to acquire current Exchange topology data from the Active Directory directory service to properly operate. The Edge Transport server will attempt to load the topology again.
   
Explanation

This Warning indicates that an exception occurred when the computer that is running the Hub Transport server role tried to load the Exchange topology configuration data. EdgeSync must be able to acquire current Exchange topology data from Active Directory to correctly operate. The Edge Transport server will try to load the topology again.

This event may be logged when the Hub Transport server tries to discover the Exchange topology data from Active Directory. The exception specified in the event description provides more information about this failure.

This event may be logged in the following circumstances:

  • If there are network connectivity issues between the Hub Transport server and a domain controller. For example, a cable may be damaged, or a computer may be experiencing high volume of network traffic.

  • If a domain controller is not correctly functioning.

   
User Action

To resolve this warning, do one or more of the following:

  • Check network connectivity between the Hub Transport server and Active Directory. Use Ping to isolate network hardware problems and incompatible configurations. Use PathPing to detect packet loss over multiple-hop trips. For more information, see Microsoft Knowledge Base article 325487, How to troubleshoot network connectivity problems.

  • Run the Dcdiag command line tool to test the domain controller health. To do this, run dcdiag /s:<Domain Controller Name> at a command prompt on the Exchange Server. Use the output of Dcdiag to discover the root cause of any failures or warnings that it reports. For more information, see Dcdiag Overview at the Microsoft Windows Server TechCenter.

  • Review the Application log for MSExchangeADAccess and MSExchange Topology events that could provide more information about the root cause of this event.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.

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