Monitor unlimited number of servers
Filter log events
Create email and web-based reports

Direct access to Microsoft articles
Customized keywords for major search engines
Access to premium content

Event ID: 2121 Source: MSExchangeDSAccess

Level
Description
Process <process name> (PID=<process id>). DSAccess is unable to connect to any domain controller in domain <name> althoughDNS was successfully queried for the service location (SRV) resource record used to locate a domain controller for that domain.
The query was for the SRV record for <name>
The following domain controllers were identified by the query: <distinguished name>
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, <text><text>.
Comments
 
As per Microsoft: "This event occurs if Diagnostics Logging on the Topology category of DSAccess is set to Minimum for the server. This event means that the domain controllers from the specified domain will not be used by DSAccess. As long as there is sufficient capacity in suitable domain controllers in other domains, it will not cause mail flow interruption. However, it is recommended that this event be investigated and fixed as soon as possible. If the event contains the name of the local domain, topology discovery cannot be completed, and this will cause mail flow interruption". See MSEX2K3DB for more details.

Windows Event Log Analysis Splunk App

Build a great reporting interface using Splunk, one of the leaders in the Security Information and Event Management (SIEM) field, linking the collected Windows events to www.eventid.net.

Read more...

 

Cisco ASA Log Analyzer Splunk App

Obtain enhanced visibility into Cisco ASA firewall logs using the free Firegen for Cisco ASA Splunk App. Take advantage of dashboards built to optimize the threat analysis process.

Read more...