berkscompsltd
6 months ago
Log Name: Directory Service
Source: Microsoft-Windows-ActiveDirectory_DomainService
Date: 17/06/2024 14:28:02
Event ID: 2092
Task Category: Replication
Level: Warning
Keywords: Classic
User: ANONYMOUS LOGON
Computer: PDC.domain.local
Description:

This server is the owner of the following FSMO role, but does not consider it valid. For the partition which contains the FSMO, this server has not replicated successfully with any of its partners since this server has been restarted. Replication errors are preventing validation of this role.

Operations which require contacting a FSMO operation master will fail until this condition is corrected.

FSMO Role: DC=domain,DC=local

User Action:

1. Initial synchronization is the first early replications done by a system as it is starting. A failure to initially synchronize may explain why a FSMO role cannot be validated. This process is explained in KB article 305476.
2. This server has one or more replication partners, and replication is failing for all of these partners. Use the command repadmin /showrepl to display the replication errors. Correct the error in question. For example there maybe problems with IP connectivity, DNS name resolution, or security authentication that are preventing successful replication.
http://support.microsoft.com .

The following operations may be impacted:
Schema: You will no longer be able to modify the schema for this forest.
Domain Naming: You will no longer be able to add or remove domains from this forest.
PDC: You will no longer be able to perform primary domain controller operations, such as Group Policy updates and password resets for non-Active Directory Domain Services accounts.
RID: You will not be able to allocation new security identifiers for new user accounts, computer accounts or security groups.
Infrastructure: Cross-domain name references, such as universal group memberships, will not be updated properly if their target object is moved or renamed.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-ActiveDirectory_DomainService" Guid="{0e8478c5-3605-4e8c-8497-1e730c959516}" EventSourceName="NTDS General" />
    <EventID Qualifiers="32768">2092</EventID>
    <Version>0</Version>
    <Level>3</Level>
    <Task>5</Task>
    <Opcode>0</Opcode>
    <Keywords>0x8080000000000000</Keywords>
    <TimeCreated SystemTime="2024-06-17T13:28:02.562666300Z" />
    <EventRecordID>7937</EventRecordID>
    <Correlation />
    <Execution ProcessID="736" ThreadID="916" />
    <Channel>Directory Service</Channel>
    <Computer>PDC.domain.local</Computer>
    <Security UserID="S-1-5-7" />
  </System>
  <EventData>
    <Data>DC=domain,DC=local</Data>
  </EventData>
</Event>
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berkscompsltd
6 months ago
OK so I just deleted the missing DC from Active Directory Users and Computers and a few messages appeared:

Log Name: Directory Service
Source: NTDS ISAM
Date: 17/06/2024 14:46:29
Event ID: 2001
Task Category: (16)
Level: Information
Keywords: Classic
User: N/A
Computer: PDC.domain.local
Description:
NTDS (736,D,0) NTDSA: Shadow copy instance 1 freeze started.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="NTDS ISAM" />
    <EventID Qualifiers="0">2001</EventID>
    <Level>4</Level>
    <Task>16</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2024-06-17T13:46:29.039945900Z" />
    <EventRecordID>7942</EventRecordID>
    <Channel>Directory Service</Channel>
    <Computer>PDC.domain.local</Computer>
    <Security />
  </System>
  <EventData>
    <Data>NTDS</Data>
    <Data>736,D,0</Data>
    <Data>NTDSA: </Data>
    <Data>1</Data>
  </EventData>
</Event>

Log Name: Directory Service
Source: Microsoft-Windows-ActiveDirectory_DomainService
Date: 17/06/2024 14:46:37
Event ID: 1917
Task Category: Backup
Level: Information
Keywords: Classic
User: SYSTEM
Computer: PDC.domain.local
Description:
The shadow copy backup for Active Directory Domain Services was successful.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-ActiveDirectory_DomainService" Guid="{0e8478c5-3605-4e8c-8497-1e730c959516}" EventSourceName="NTDS General" />
    <EventID Qualifiers="16384">1917</EventID>
    <Version>0</Version>
    <Level>4</Level>
    <Task>14</Task>
    <Opcode>0</Opcode>
    <Keywords>0x8080000000000000</Keywords>
    <TimeCreated SystemTime="2024-06-17T13:46:37.660920000Z" />
    <EventRecordID>7943</EventRecordID>
    <Correlation />
    <Execution ProcessID="736" ThreadID="7440" />
    <Channel>Directory Service</Channel>
    <Computer>PDC.domain.local</Computer>
    <Security UserID="S-1-5-18" />
  </System>
  <EventData>
  </EventData>
</Event>
Log Name: Directory Service
Source: Microsoft-Windows-ActiveDirectory_DomainService
Date: 17/06/2024 14:59:42
Event ID: 2041
Task Category: Internal Processing
Level: Information
Keywords: Classic
User: N/A
Computer: PDC.domain.local
Description:
Duplicate event log entries were suppressed.

See the previous event log entry for details. An entry is considered a duplicate if the event code and all of its insertion parameters are identical. The time period for this run of duplicates is from the time of the previous event to the time of this event.

Event Code:
8000082c
Number of duplicate entries:
10
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-ActiveDirectory_DomainService" Guid="{0e8478c5-3605-4e8c-8497-1e730c959516}" EventSourceName="NTDS General" />
    <EventID Qualifiers="16384">2041</EventID>
    <Version>0</Version>
    <Level>4</Level>
    <Task>9</Task>
    <Opcode>0</Opcode>
    <Keywords>0x8080000000000000</Keywords>
    <TimeCreated SystemTime="2024-06-17T13:59:42.469700200Z" />
    <EventRecordID>7944</EventRecordID>
    <Correlation />
    <Execution ProcessID="736" ThreadID="2076" />
    <Channel>Directory Service</Channel>
    <Computer>PDC.domain.local</Computer>
    <Security />
  </System>
  <EventData>
    <Data>8000082c</Data>
    <Data>10</Data>
  </EventData>
</Event>

Log Name: Directory Service
Source: Microsoft-Windows-ActiveDirectory_DomainService
Date: 17/06/2024 14:59:42
Event ID: 1123
Task Category: Knowledge Consistency Checker
Level: Information
Keywords: Classic
User: ANONYMOUS LOGON
Computer: PDC.domain.local
Description:
The Knowledge Consistency Checker (KCC) deleted the following Connection object because the source directory service that it referenced has been deleted.

Object:
CN=f3d6d81e-0c76-4dd2-a83a-b74c01f89e4d,CN=NTDS Settings,CN=PDC,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=domain,DC=local
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-ActiveDirectory_DomainService" Guid="{0e8478c5-3605-4e8c-8497-1e730c959516}" EventSourceName="NTDS General" />
    <EventID Qualifiers="16384">1123</EventID>
    <Version>0</Version>
    <Level>4</Level>
    <Task>1</Task>
    <Opcode>0</Opcode>
    <Keywords>0x8080000000000000</Keywords>
    <TimeCreated SystemTime="2024-06-17T13:59:42.469700200Z" />
    <EventRecordID>7945</EventRecordID>
    <Correlation />
    <Execution ProcessID="736" ThreadID="2076" />
    <Channel>Directory Service</Channel>
    <Computer>PDC.domain.local</Computer>
    <Security UserID="S-1-5-7" />
  </System>
  <EventData>
    <Data>CN=f3d6d81e-0c76-4dd2-a83a-b74c01f89e4d,CN=NTDS Settings,CN=PDC,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=domain,DC=local</Data>
  </EventData>
</Event>

Log Name: Directory Service
Source: Microsoft-Windows-ActiveDirectory_DomainService
Date: 17/06/2024 14:59:47
Event ID: 1272
Task Category: Knowledge Consistency Checker
Level: Information
Keywords: Classic
User: ANONYMOUS LOGON
Computer: PDC.domain.local
Description:
The following directory partition is no longer replicated from the source directory service at the following network address because there is no Connection object for the directory service.

Directory partition:
DC=domain,DC=local
Source directory service:

Network address:
b4821c33-2b18-41af-a2f2-f06818133623._msdcs.domain.local
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-ActiveDirectory_DomainService" Guid="{0e8478c5-3605-4e8c-8497-1e730c959516}" EventSourceName="NTDS General" />
    <EventID Qualifiers="16384">1272</EventID>
    <Version>0</Version>
    <Level>4</Level>
    <Task>1</Task>
    <Opcode>0</Opcode>
    <Keywords>0x8080000000000000</Keywords>
    <TimeCreated SystemTime="2024-06-17T13:59:47.123278700Z" />
    <EventRecordID>7946</EventRecordID>
    <Correlation />
    <Execution ProcessID="736" ThreadID="2076" />
    <Channel>Directory Service</Channel>
    <Computer>PDC.domain.local</Computer>
    <Security UserID="S-1-5-7" />
  </System>
  <EventData>
    <Data>DC=domain,DC=local</Data>
    <Data>b4821c33-2b18-41af-a2f2-f06818133623._msdcs.domain.local</Data>
    <Data>
    </Data>
  </EventData>
</Event>

And after a few minutes the domain had resolved it's replication problems as the partner no longer existed and the domain returned to normal functionality and we could join machines etc. once more.
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