Event ID - 2046

Event Id2046
SourceNTDS LDAP
DescriptionAll of Active Directorys LDAP send queues are full. This can be caused by clients that continue to send requests faster than they are processing the results. In order to prevent the server from becoming unresponsive as a result of this condition Active Directory has closed number connections that are not bound as Administrators. Active Directory will continue to close connections until enough send queue space has been recovered to operate normally.
Event InformationAfter you run the Dcpromo.exe tool to install the first Microsoft Windows Server 2003 computer in a domain, and then you restart the computer, you may receive Lightweight Directory Access Protocol (LDAP) bind errors.

When you run the Dcdiag utility on the computer, you may receive the following error message: LDAP search failed with error 55. The specified network resource or device is no longer available. When you run the Netdiag.exe diagnostic utility on the computer, you may receive the following error message: Cannot do un-authenticated ldap_search to ServerName.DomainName.com: Unavailable. [WARNING] Failed to query SPN registration on DC ServerName.DomainName.com.

For more information click on the link given below to a Microsoft article.
Reference LinksYou receive LDAP bind errors after you run Dcpromo to install the first Windows Server 2003 computer in a domain

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