The Exchange Active Directory Provider couldn't contact a domain controller in the domain, but it could resolve the name.
Applies to: Operations Manager Management Pack for Exchange 2010
Topic Last Modified: 2011-08-02
The Microsoft Exchange Server 2010 Management Pack for System Center Operations Manager monitors the Windows Application log on computers running Exchange 2010 and generates this alert when the events specified in the following Details table are logged.
To learn more about this alert, in Operations Manager, do one or more of the following:
From the Operations Console, double-click this alert, and then click the General tab. Review the description of the alert that includes the variables specific to your environment.
From the Operations Console, double-click this alert, and then click the Alert Context tab. Review the logged events that meet the criteria of this Operations Manager alert.
Details
Product Name |
Exchange |
Product Version |
14.0 (Exchange 2010) |
Event ID |
2121 |
Event Source |
MSExchange ADAccess |
Alert Type |
Warning |
Rule Path |
Microsoft Exchange Server/Exchange 2010/Common Components/Active Directory Access |
Rule Name |
The Exchange Active Directory Provider couldn't contact a domain controller in the domain, but it could resolve the name. |
Explanation
This Warning event indicates that the Active Directory Provider could not connect to one or more domain controllers in the domain specified in the event description. This event may occur if one or both of the following conditions are true:
The host records that map Fully Qualified Domain Name (FQDN) of the domain controllers to their IP addresses are missing or contain incorrect addresses.
The domain controllers identified by DNS query are not working or not reachable on the network.
User Action
To resolve this warning, perform the following steps:
Use the
Ping
orPathPing
command-line tools to test basic connectivity. UsePing
to isolate network hardware problems and incompatible configurations. UsePathPing
to 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 domain controller specified in the event description is correctly registered 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.