Process %1 (PID=%2). An LDAP Notify call failed – Server=%3 Error code=%4 (%8). Base DN=%5, Filter=%6, Scope=%7.

Product: Exchange
Event ID: 2066
Source: MSExchangeADAccess
Version: 8.0
Message: Process %1 (PID=%2). An LDAP Notify call failed – Server=%3 Error code=%4 (%8). Base DN=%5, Filter=%6, Scope=%7.

This Warning event indicates that a Lightweight Directory Access Protocol (LDAP) notification created by an Exchange component has failed. In absence of other events, this usually means that there is a problem with a particular user or operation. Therefore, this event should not affect overall mail flow. However, certain Exchange operations that depended on the failed notification can fail. You should investigate the cause of this event.

User Action

To resolve this warning, look for related events in the Application log. Increase logging for the MSExchangeADAccess\Topology category to Minimum or higher.

  • To review the current MSExchangeADAccess service diagnostic logging settings, in the Exchange Management Shell, type Get-EventLogLevel MSExchangeADAccess.

  • To change the logging level for the Topology category, in the Exchange Management Shell, type Set-EventlogLevel MSExchangeADAccess\Topology -Level Minimum.

For more information about diagnostic logging commands, see Get-EventLogLevel and Set -EventLogLevel in the Exchange 2007 Help.

Note  If you aren’t already doing so, consider running the tools that 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 mailflow, and better manage disaster-recovery scenarios. Go to the Toolbox node of 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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