Process %1 (PID=%2). Exchange Active Directory Provider is unable to connect to the Domain Controller %3 although its service location (SRV) resource record was found in the DNS The query was for the SRV record for %4 The following domain controllers were identified by the query:%5 Common causes of this error include: – Host (A) records that map the name of the domain controller to its IP addresses are missing or contain incorrect addresses. – Domain controllers registered in DNS are not connected to the network or are not running. For information about correcting this problem, %6%7

Details
Product: Exchange
Event ID: 2123
Source: MSExchange ADAccess
Version: 8.0
Symbolic Name: DSC_EVENT_DNS_NO_ERROR_DC_FOUND
Message: Process %1 (PID=%2). Exchange Active Directory Provider is unable to connect to the Domain Controller %3 although
its service location (SRV) resource record was found in the DNS
The query was for the SRV record for %4
The following domain controllers were identified by the query:%5
Common causes of this error include:
– Host (A) records that map the name of the domain controller to its IP addresses are missing
or contain incorrect addresses.
– Domain controllers registered in DNS are not connected to the network or are not running.
For information about correcting this problem, %6%7
   
Explanation

This Warning event indicates that Microsoft® Exchange Active Directory Provider could not connect to the domain controller specified in the event description. This event may occur if one or both of the following conditions are true:

  • The host record that maps the Fully Qualified Domain Name (FQDN) of the specified domain controller to its IP address is missing or contains an incorrect address.

  • The specified domain controller is not working or not reachable on the network.

   
User Action

To resolve this warning, perform the following steps:

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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