MSExchange ADAccess 2123
This article provides an explanation and possible resolutions for a specific Exchange event. If you don't find what you’re looking for here, try searching Exchange 2010 Help.
Details
Product Name |
Exchange |
Product Version |
14.0 |
Event ID |
2123 |
Category |
Topology |
Symbolic Name |
DSC_EVENT_DNS_NO_ERROR_DC_FOUND |
Message Text |
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 %n The query was for the SRV record for %4%n The following domain controllers were identified by the query:%n%5%n Common causes of this error include:%n - Host (A) records that map the name of the domain controller to its IP addresses are missing or contain incorrect addresses.%n - Domain controllers registered in DNS are not connected to the network or are not running.%n For information about correcting this problem, %6%7 |
Explanation
This Warning event indicates that the 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:
Use the
PingorPathPingcommand-line tools to test basic connectivity. UsePingto isolate network hardware problems and incompatible configurations. UsePathPingto detect packet loss over multiple-hop trips. For more information, see Microsoft Knowledge Base article 325487, Advanced network adapter troubleshooting for Windows workstations.Make sure that the domain controller specified in the event description is registered correctly on the DNS server. For more information, see the following topics:
Review other related Warning and Error events in the Application log. These related events may provide more information about the root cause of this warning.
For More Information
If you are not already doing so, consider running the Exchange tools, which have been created to help you analyze and troubleshoot your Exchange environment. These tools can help make sure that your configuration aligns with Microsoft best practices. They can also help you identify and resolve performance issues and improve mail flow. To run these tools, go to the Toolbox node of the Exchange Management Console. To learn more about these tools, see Managing Tools in the Toolbox.