Global Catalog Issue

Question

Our domain has 4 sites in Active Directory environment. Has had 4 domain controllers in Active Directory environment. 1 DC-used to be primary domain controller. Roles transferred while DC in operation to #4. Afterwards, DC demoted, etc the right way. New server created to replace 1, same IP address. Added to domain about 3 months ago. 2 DC-crashed a couple of years ago. Recently removed from Active Directory Sites and Services. About 2 weeks ago. 3 DC-has been running since domain created. Gives no problems. 4 DC-new. Created about 6 months ago. Roles from #1 transferred to this one to make it the primary.

A new project has brought to light that both 1 & 4 are not advertising as Global Catalog Servers. This is the part I could use help with.

C:\Users\administrator>repadmin /replsum
Replication Summary Start Time: 2021-07-28 08:49:04

Source DSA largest delta fails/total %% error
1 08m:55s 0 / 5 0
3 14m:54s 0 / 10 0
4 14m:54s 0 / 10 0

Destination DSA largest delta fails/total %% error
4 14m:54s 0 / 10 0
3 07m:57s 0 / 5 0
1 08m:55s 0 / 10 0

C:\Users\>repadmin /showconn

Repadmin: running command /showconn against full DC localhost
Base DN:
==== KCC CONNECTION OBJECTS ============================================
Connection --
Connection name :
Server DNS name :
Server DN name :
Source: 4
No Failures.
TransportType: IP
options: isGenerated overrideNotifyDefault
ReplicatesNC: DC=DomainDnsZones,
Reason: IntersiteTopology
Replica link has been added.
ReplicatesNC: DC=ForestDnsZones,
Reason: IntersiteTopology
Replica link has been added.
ReplicatesNC:
Reason: IntersiteTopology
Replica link has been added.
ReplicatesNC: CN=Configuration,
Reason: IntersiteTopology
Replica link has been added.
Connection --
Connection name :
Server DNS name :
Server DN name :
Source: 3
******* 1 CONSECUTIVE FAILURES since 2021-07-28 08:37:40
Last error: 8464 (0x2110):
Synchronization attempt failed because the destination DC is currently waiting to synchronize new partial attributes from source. This condition is normal if a recent schema change modified the partial attribute set. The destination partial attribute set is not a subset of source partial attribute set.
TransportType: IP
options: isGenerated overrideNotifyDefault
ReplicatesNC: DC=4
Reason: GCTopology IntersiteTopology
******* WARNING: KCC could not add this REPLICA LINK due to error.
ReplicatesNC: DC=ForestDnsZones,
Reason: GCTopology IntersiteTopology
Replica link has been added.
ReplicatesNC:
Reason: GCTopology IntersiteTopology
Replica link has been added.
ReplicatesNC: DC=DomainDnsZones
Reason: GCTopology IntersiteTopology
Replica link has been added.
ReplicatesNC: CN=Configuration
Reason: GCTopology IntersiteTopology
Replica link has been added.
2 connections found.

C:\Users\>repadmin /showrepl

Repadmin: running command /showrepl against full DC localhost
4
DSA Options: IS_GC
WARNING: Not advertising as a global catalog.
Site Options: (none)
DSA object GUID:
DSA invocationID:

==== INBOUND NEIGHBORS ======================================

DC=
1- via RPC
DSA object GUID:
Last attempt @ 2021-07-28 08:04:10 was successful.
3- via RPC
DSA object GUID:
Last attempt @ 2021-07-28 08:04:10 was successful.

CN=Configuration,
1- via RPC
DSA object GUID:
Last attempt @ 2021-07-28 08:04:10 was successful.
3- via RPC
DSA object GUID:
Last attempt @ 2021-07-28 08:04:10 was successful.

CN=Schema,CN=Configuration,
1- via RPC
DSA object GUID:
Last attempt @ 2021-07-28 08:04:10 was successful.
3- via RPC
DSA object GUID:
Last attempt @ 2021-07-28 08:04:10 was successful.

DC=DomainDnsZones,
1- via RPC
DSA object GUID:
Last attempt @ 2021-07-28 08:04:10 was successful.
3-via RPC
DSA object GUID:
Last attempt @ 2021-07-28 08:04:10 was successful.

DC=ForestDnsZones,
1- via RPC
DSA object GUID:
Last attempt @ 2021-07-28 08:04:10 was successful.
3- via RPC
DSA object GUID:
Last attempt @ 2021-07-28 08:04:10 was successful.

Source: 3-
******* 1 CONSECUTIVE FAILURES since 2021-07-28 07:51:04
Last error: 8464 (0x2110):
Synchronization attempt failed because the destination DC is currently waiting to synchronize new partial attributes from source. This condition is normal if a recent schema change modified the partial attribute set. The destination partial attribute set is not a subset of source partial attribute set.

Naming Context: DC=4
Source: 3
******* WARNING: KCC could not add this REPLICA LINK due to error.

Since 1 & 4 replication commands both balk at 3, I'm thinking there's something with 3. Any advice?

Answer 1

You can follow along here.
https://learn.microsoft.com/en-us/troubleshoot/windows-server/identity/replication-error-8464

--please don't forget to upvote and Accept as answer if the reply is helpful--

Answer 2

Have you tried rebooting, I normally try that first. Hope that helps!!