Event ID - 1101

Event Id1101
SourceNTDS Replication
DescriptionThe directory replication agent (DRA) was able to successfully apply the changes to object DC=@,DC=xyz.example.com,CN=MicrosoftDNS,CN=System, DC=xyz,DC=example,DC=com (GUID 77d76064-f49e-4762-ba8c-324b6c518f11) after backing out one or more of the attribute changes. Preceding messages will indicate which attributes were reversed. Please note that this will have the effect of nullifying the change where it was made, causing the original update not to take effect. The originator should be notified that their change was not accepted by the system.
Event InformationIn Active Directory you can associate up to 800 values to a single object. This problem has resolved in latest service pack for Win2k.

Domain Name System (DNS) registrations of SRV and domain controller (DC) locator A records (registered by Netlogon) and NS records (added by the authoritative DNS servers) in an Active Directory-integrated DNS zone for some DCs may not work in a domain that contains a large number of DCs (usually over 800). If the Active Directory-integrated DNS zone has the same name as the Active Directory domain name, problems with the registration of A records and NS records at the zone root seem to occur in a domain with more than 400 DCs.You can view this event id along with few more.
The following Micosoft article will give more information about this event.
Reference LinksProblems with Many Domain Controllers with Active Directory Integrated DNS Zones

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