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support/windows-server/active-directory/problems-with-dc-ad-integrated-dns-zones.md

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## More Information
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Every DNS server that is authoritative for an Active Directory-integrated DNS zone adds an NS record. By default, every DC in a domain registers an SRV record for a set of non-site-specific names such as "_ldap._tcp.\<domain_name>" and A record(s) that map(s) the Active Directory DNS domain name to the TCP/IP address(es) of the DC. When a DNS server tries to write a record with many values for the same shared name, Local Security Authority Subsystem (LSASS) runs at 100 percent CPU usage for approximately 10 seconds and the registration doesn't succeed. Netlogon retries this registration every hour; the 100 percent CPU usage spike reappears at least once an hour and the attempted registrations don't succeed.
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Every DNS server that is authoritative for an Active Directory-integrated DNS zone adds an NS record. By default, every DC in a domain registers an SRV record for a set of non-site-specific names such as "_ldap._tcp.\<domain_name>" and A record(s) that map(s) the Active Directory DNS domain name to the TCP/IP address(es) of the DC. When a DNS server tries to write a record with many values for the same shared name, Local Security Authority Subsystem Service (LSASS) runs at 100 percent CPU usage for approximately 10 seconds and the registration doesn't succeed. Netlogon retries this registration every hour; the 100 percent CPU usage spike reappears at least once an hour and the attempted registrations don't succeed.
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## References
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