I noticed this error showing up in my Directory Service logs, and I've done some research and ran some commands. When I run repadmin /showrepl or repadmin /replsum, I don't see any replication errors. I ran dcdiag /e to get a little more info, and saw some
warnings regarding sysvol, however, the only sysvol errors I see in the logs are regarding pausing for backup.
I ran repadmin /showvector /latency and got the output below. It lists two Domain Controllers that were demoted and removed in February of this year. They were replaced with new Domain Controllers with the same names. I'm not sure if this is part of the
issue.
C:\Windows\system32>repadmin /showvector /latency DC=domainname,DC=internal
Caching GUIDs.
..
60412fcd-4cd5-4915-b3fe-ed02f2dfed21 @ USN 28281794 @ Time 2018-02-05 12:32:25
Default-First-Site-Name\ONPREM-DC1 (deleted DSA) @ USN 28362837 @ Time 2018-02-07 0
7:24:11
Default-First-Site-Name\ONPREM-DC2 (deleted DSA) @ USN 30001827 @ Time 2018-02-27 0
7:34:47
CLOUD\CLOUD-DC1 @ USN 2370332 @ Time 2018-07-11 12:48:51
CLOUD\CLOUD-DC2 @ USN 1757081 @ Time 2018-07-11 12:50:46
Default-First-Site-Name\ONPREM-DC3 @ USN 34359214 @ Time 2018-07-11 12:52:00
Default-First-Site-Name\ONPREM-DC2 @ USN 8066825 @ Time 2018-07-11 12:52:05
Default-First-Site-Name\ONPREM-DC1 @ USN 10051172 @ Time 2018-07-11 12:52:08
The top line of this output from 2018-02-05 is from a failed attempt to demote ONPREM-DC1 due to protection of accidental deleting. The wizard rolled back the changes successfully and the host was successfully demoted on 2018-02-07.
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Below is the dcdiag output:
Directory Server Diagnosis
Performing initial setup:
Trying to find home server...
Home Server = onprem-dc1
* Identified AD Forest.
Done gathering initial info.
Doing initial required tests
Testing server: Default-First-Site-Name\ONPREM-DC3
Starting test: Connectivity
......................... ONPREM-DC3 passed test Connectivity
Testing server: CLOUD\CLOUD-DC1
Starting test: Connectivity
......................... CLOUD-DC1 passed test Connectivity
Testing server: CLOUD\CLOUD-DC2
Starting test: Connectivity
......................... CLOUD-DC2 passed test Connectivity
Testing server: Default-First-Site-Name\ONPREM-DC1
Starting test: Connectivity
......................... ONPREM-DC1 passed test Connectivity
Testing server: Default-First-Site-Name\ONPREM-DC2
Starting test: Connectivity
......................... ONPREM-DC2 passed test Connectivity
Doing primary tests
Testing server: Default-First-Site-Name\ONPREM-DC3
Starting test: Advertising
......................... ONPREM-DC3 passed test Advertising
Starting test: FrsEvent
......................... ONPREM-DC3 passed test FrsEvent
Starting test: DFSREvent
There are warning or error events within the last 24 hours after the
SYSVOL has been shared. Failing SYSVOL replication problems may cause
Group Policy problems.
......................... ONPREM-DC3 failed test DFSREvent
Starting test: SysVolCheck
......................... ONPREM-DC3 passed test SysVolCheck
Starting test: KccEvent
......................... ONPREM-DC3 passed test KccEvent
Starting test: KnowsOfRoleHolders
......................... ONPREM-DC3 passed test KnowsOfRoleHolders
Starting test: MachineAccount
......................... ONPREM-DC3 passed test MachineAccount
Starting test: NCSecDesc
......................... ONPREM-DC3 passed test NCSecDesc
Starting test: NetLogons
......................... ONPREM-DC3 passed test NetLogons
Starting test: ObjectsReplicated
......................... ONPREM-DC3 passed test ObjectsReplicated
Starting test: Replications
......................... ONPREM-DC3 passed test Replications
Starting test: RidManager
......................... ONPREM-DC3 passed test RidManager
Starting test: Services
......................... ONPREM-DC3 passed test Services
Starting test: SystemLog
......................... ONPREM-DC3 passed test SystemLog
Starting test: VerifyReferences
......................... ONPREM-DC3 passed test VerifyReferences
Testing server: CLOUD\CLOUD-DC1
Starting test: Advertising
......................... CLOUD-DC1 passed test Advertising
Starting test: FrsEvent
......................... CLOUD-DC1 passed test FrsEvent
Starting test: DFSREvent
There are warning or error events within the last 24 hours after the
SYSVOL has been shared. Failing SYSVOL replication problems may cause
Group Policy problems.
......................... CLOUD-DC1 failed test DFSREvent
Starting test: SysVolCheck
......................... CLOUD-DC1 passed test SysVolCheck
Starting test: KccEvent
......................... CLOUD-DC1 passed test KccEvent
Starting test: KnowsOfRoleHolders
......................... CLOUD-DC1 passed test KnowsOfRoleHolders
Starting test: MachineAccount
......................... CLOUD-DC1 passed test MachineAccount
Starting test: NCSecDesc
......................... CLOUD-DC1 passed test NCSecDesc
Starting test: NetLogons
......................... CLOUD-DC1 passed test NetLogons
Starting test: ObjectsReplicated
......................... CLOUD-DC1 passed test ObjectsReplicated
Starting test: Replications
......................... CLOUD-DC1 passed test Replications
Starting test: RidManager
......................... CLOUD-DC1 passed test RidManager
Starting test: Services
......................... CLOUD-DC1 passed test Services
Starting test: SystemLog
......................... CLOUD-DC1 passed test SystemLog
Starting test: VerifyReferences
......................... CLOUD-DC1 passed test VerifyReferences
Testing server: CLOUD\CLOUD-DC2
Starting test: Advertising
......................... CLOUD-DC2 passed test Advertising
Starting test: FrsEvent
......................... CLOUD-DC2 passed test FrsEvent
Starting test: DFSREvent
......................... CLOUD-DC2 passed test DFSREvent
Starting test: SysVolCheck
......................... CLOUD-DC2 passed test SysVolCheck
Starting test: KccEvent
......................... CLOUD-DC2 passed test KccEvent
Starting test: KnowsOfRoleHolders
......................... CLOUD-DC2 passed test KnowsOfRoleHolders
Starting test: MachineAccount
......................... CLOUD-DC2 passed test MachineAccount
Starting test: NCSecDesc
......................... CLOUD-DC2 passed test NCSecDesc
Starting test: NetLogons
......................... CLOUD-DC2 passed test NetLogons
Starting test: ObjectsReplicated
......................... CLOUD-DC2 passed test ObjectsReplicated
Starting test: Replications
......................... CLOUD-DC2 passed test Replications
Starting test: RidManager
......................... CLOUD-DC2 passed test RidManager
Starting test: Services
......................... CLOUD-DC2 passed test Services
Starting test: SystemLog
......................... CLOUD-DC2 passed test SystemLog
Starting test: VerifyReferences
......................... CLOUD-DC2 passed test VerifyReferences
Testing server: Default-First-Site-Name\ONPREM-DC1
Starting test: Advertising
......................... ONPREM-DC1 passed test Advertising
Starting test: FrsEvent
......................... ONPREM-DC1 passed test FrsEvent
Starting test: DFSREvent
There are warning or error events within the last 24 hours after the
SYSVOL has been shared. Failing SYSVOL replication problems may cause
Group Policy problems.
......................... ONPREM-DC1 failed test DFSREvent
Starting test: SysVolCheck
......................... ONPREM-DC1 passed test SysVolCheck
Starting test: KccEvent
......................... ONPREM-DC1 passed test KccEvent
Starting test: KnowsOfRoleHolders
......................... ONPREM-DC1 passed test KnowsOfRoleHolders
Starting test: MachineAccount
......................... ONPREM-DC1 passed test MachineAccount
Starting test: NCSecDesc
......................... ONPREM-DC1 passed test NCSecDesc
Starting test: NetLogons
......................... ONPREM-DC1 passed test NetLogons
Starting test: ObjectsReplicated
......................... ONPREM-DC1 passed test ObjectsReplicated
Starting test: Replications
......................... ONPREM-DC1 passed test Replications
Starting test: RidManager
......................... ONPREM-DC1 passed test RidManager
Starting test: Services
......................... ONPREM-DC1 passed test Services
Starting test: SystemLog
......................... ONPREM-DC1 passed test SystemLog
Starting test: VerifyReferences
......................... ONPREM-DC1 passed test VerifyReferences
Testing server: Default-First-Site-Name\ONPREM-DC2
Starting test: Advertising
......................... ONPREM-DC2 passed test Advertising
Starting test: FrsEvent
......................... ONPREM-DC2 passed test FrsEvent
Starting test: DFSREvent
There are warning or error events within the last 24 hours after the
SYSVOL has been shared. Failing SYSVOL replication problems may cause
Group Policy problems.
......................... ONPREM-DC2 failed test DFSREvent
Starting test: SysVolCheck
......................... ONPREM-DC2 passed test SysVolCheck
Starting test: KccEvent
......................... ONPREM-DC2 passed test KccEvent
Starting test: KnowsOfRoleHolders
......................... ONPREM-DC2 passed test KnowsOfRoleHolders
Starting test: MachineAccount
......................... ONPREM-DC2 passed test MachineAccount
Starting test: NCSecDesc
......................... ONPREM-DC2 passed test NCSecDesc
Starting test: NetLogons
......................... ONPREM-DC2 passed test NetLogons
Starting test: ObjectsReplicated
......................... ONPREM-DC2 passed test ObjectsReplicated
Starting test: Replications
......................... ONPREM-DC2 passed test Replications
Starting test: RidManager
......................... ONPREM-DC2 passed test RidManager
Starting test: Services
......................... ONPREM-DC2 passed test Services
Starting test: SystemLog
......................... ONPREM-DC2 passed test SystemLog
Starting test: VerifyReferences
......................... ONPREM-DC2 passed test VerifyReferences
Running partition tests on : DomainDnsZones
Starting test: CheckSDRefDom
......................... DomainDnsZones passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... DomainDnsZones passed test
CrossRefValidation
Running partition tests on : ForestDnsZones
Starting test: CheckSDRefDom
......................... ForestDnsZones passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... ForestDnsZones passed test
CrossRefValidation
Running partition tests on : Schema
Starting test: CheckSDRefDom
......................... Schema passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... Schema passed test CrossRefValidation
Running partition tests on : Configuration
Starting test: CheckSDRefDom
......................... Configuration passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... Configuration passed test CrossRefValidation
Running partition tests on : domainname
Starting test: CheckSDRefDom
......................... domainname passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... domainname passed test CrossRefValidation
Running enterprise tests on : domainname.internal
Starting test: LocatorCheck
......................... domainname.internal passed test LocatorCheck
Starting test: Intersite
Doing intersite inbound replication test on site
Default-First-Site-Name:
Doing intersite inbound replication test on site CLOUD:
......................... domainname.internal passed test Intersite