Process (PID=). Domain controller was not found when DNS was queried for the service location (SRV) resource records for domain The query was for the SRV record for The following domain controllers were identified by the query:Common causes of this error include the following:- The DNS SRV records required to locate a domain controller for the domain are not registered in DNS. These records are registered with a DNS server automatically when a domain controller is added to a domain. They are updated by the domain controller at set intervals. This computer is configured to use DNS servers with following IP addresses:- One or more of the following zones do not include delegation to its child zone:For information about correcting this problem,

Details
Product: Exchange
Event ID: 2124
Source: MSExchangeDSAccess
Version: 6.5.6940.0
Component: Microsoft Exchange Directory Access Cache
Message: Process <process name> (PID=<process id>). Domain controller <distinguished name> was not found when DNS was queried for the service location (SRV) resource records for domain <distinguished name>The query was for the SRV record for <distinguished name>The following domain controllers were identified by the query:<name>Common causes of this error include the following:- The DNS SRV records required to locate a domain controller for the domain are not registered in DNS. These records are registered with a DNS server automatically when a domain controller is added to a domain. They are updated by the domain controller at set intervals. This computer is configured to use DNS servers with following IP addresses:<address>– One or more of the following zones do not include delegation to its child zone:<name>For information about correcting this problem, <text><text>
   
Explanation

This event occurs if Diagnostics Logging on the Topology category of DSAccess is set to Minimum for the server. This event indicates that the SRV records for the specified domain controller cannot be found. 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, mail flow will not be interrupted. 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. As mentioned in the text of the event, this is caused if the DNS SRV resource record is not registered in DNS.

   
User Action

Verify that the SRV resource record for the requested domain and service type exists in DNS. You can do this using the DcDiag command-line tool, which must be run on a domain controller for the specified Active Directory domain. Verify DNS zone delegations by using the Nslookup command-line tool.

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