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Check to make sure that every NS IP address is listed under the Name Servers tab under DNS.
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All the name servers and their respective IP addresses are in the Name Servers tab.<br />
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Sorry, for delay. &nbsp;Have been out for a week.
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Are they on different subnets? How do the sites connect?
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The name servers are on different subnets. &nbsp;I have site links that are set to sync everything. &nbsp;<br />
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It looks like when the PC gets an address from DHCP, it is entered on the local DNS name server OK, but does not replicate to the other name servers. &nbsp;I'm just talking about the AD integrated zone.
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After looking things over, I put my closely connected (fiber WAN) DCs in the same site. &nbsp;This took care of the problem. &nbsp;Now even my remote DCs are getting timely updates.
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The active directory integrated zones on my DNS servers are not syncing from site to site. &nbsp;Manual entries seem to sync OK, but workstations' dynamic addresses are not. &nbsp;This is causing problems when someone form site A makes a request from site B, and there is no DNS entry on site B.<br />
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Side note: &nbsp;There are correct entries in the revers lookup zones.
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The active directory integrated zones on my DNS servers are not syncing from site to site.  Manual entries seem to sync OK, but workstations' dynamic addresses are not.  This is causing problems when someone form site A makes a request from site B, and there is no DNS entry on site B.

Side note:  There are correct entries in the revers lookup zones.

Active directory integrated DNS not syncing from site to site.

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.

Active Directory

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.