Active Administrator 8.6 - User Guide

Missing SRV DNS record for either the primary or secondary DNS server

Missing SRV DNS record for either the primary or secondary DNS server

Indicates one or more requisite Domain Name System (DNS) Service (SRV) entries are not defined. DNS SRV entries are vital to the proper functioning of Active Directory®.

Data collector

•	Category: General

•	Name: Missing domain controller SRV DNS record

•	Supported on: Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, and Windows Server 2019

•	Required permissions: When monitored locally and remotely, only domain user privilege is required. When monitored remotely, the target server must have WMI remote access enabled and the user must be a member of the Distributed COM Users group.

Description

Active Directory Health Analyzer queries the DNS service for the SRV entries required for each zone hosted on the server. Note that this applies exclusively to zones designated as primary. If any of the SRV entries are not present, this alert is raised. Active Directory Health Analyzer does not evaluate SRV entries for accuracy, but only checks if the entries are present.

Active Directory Health Analyzer confirms the existence of the following SRV entries for each zone hosted on the server:

_ldap._tcp.<zone-name>

_ldap._tcp.dc._msdcs.<zone-name>

_ldap._tcp.pdc._msdcs.<zone-name>

_kerberos._tcp.<zone-name>

_kerberos._udp.<zone-name>

_kerberos._tcp.dc._msdcs.<zone-name>

_kpasswd._tcp.<zone-name>

_kpasswd._udp.<zone-name>

This alert is accompanied by a list of the missing SRV entries.

Whenever a domain controller is promoted, the Microsoft NetLogon process registers the applicable SRV entries with the primary DNS server of the affected domain. As SRV entries are used to identify the constituent domain controllers, the Primary Domain Controller(PDC), and the owner of the global catalog of each zone, the absence of an SRV entry can have serious consequences for Active Directory.

The presence of all requisite SRV locator entries is evaluated for top-level zones exclusively. However, SRV locator entries of sub-zones that host at least one domain controller (with a Directory Analyzer agent) are evaluated.

Cause

Typically, missing SRV entries indicate that Dynamic DNS has been disabled for one or more DNS zones. Active Directory relies on Dynamic DNS to update all affected entries when network resources are altered or relocated. Other possible causes include DCPROMO failure, and erroneous manual configuration of SRV entries.

NOTE: Dynamic DNS can be disabled explicitly via Windows Registry settings.

Resolution

Confirm that Dynamic DNS is enabled on all applicable zones. Either add the SRV entries manually in the DNS Management Console or cause the entries to be refreshed (for example, by demoting and subsequently promoting the effected domain controllers).

NETLOGON not shared

NETLOGON not shared

Indicates that the NETLOGON folder is not shared. File Replication Service requires this folder to be shared on domain controllers for replication to work correctly.

Data collector

•	Category: Validations

•	Name: Is the domain controller folder Netlogon shared

•	Supported on: Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, and Windows Server 2019

•	Required permissions: When monitored locally and remotely, only domain user privilege is required. When monitored remotely, the target server must have WMI remote access enabled and the user must be a member of the Distributed COM Users group.

Description

Logon scripts for a domain controller are found under the NETLOGON admin share for Windows NT. On Windows NT domain controllers, the %SystemRoot%\System32\Repl\Import\Scripts folder is shared as NETLOGON. Dcpromo modifies the registry value that defines the path to the NETLOGON share to %SystemRoot%\Sysvol\Sysvol\domain_name\Scripts.

The default folder structure is:

%SystemRoot%\Sysvol\Sysvol\domain_name\Policies

%SystemRoot%\Sysvol\Sysvol\domain_name\Scripts

Any changes to the %systemroot%\SYSVOL folder on any domain controller are replicated to the other domain controllers in the domain. Replication is RPC based.

You can use NETLOGON and SYSVOL to distinguish between a domain controller and a member server. If both the NETLOGON and SYSVOL shares exist on a server, it is a domain controller. When dcpromo demotes a domain controller to a member server, the NETLOGON share is removed, so the presence of only SYSVOL indicates a member server.

Resolution

All potential source domain controllers in the domain should themselves have shared the NETLOGON and SYSVOL shares and applied default domain and domain controllers policy.

SYSVOL directory structure:

Domain

DO NOT REMOVE NtFrs PreInstall Directory

Policies

{GUID}

Adm

Machine

User

{GUID}

Adm

Machine

User

{etc.,}

Scripts

Staging

Staging Areas

MyDomainName.com

Scripts

Sysvol( sysvol share )

MyDomainName.com

DO NOT REMOVE NtFrs PreInstall Directory

Policies

{GUID}

Adm

Machine

User

{GUID}

Adm

Machine

User

{etc.,}

Scripts(NETLOGON share)

To set the Netlogon path

1	Click Start, Click Run, type regedit, and press ENTER.

2	Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters.

3	Right-click NetLogon, and select Modify.

4	In the Value data box, enter the new path, including the drive letter, and click OK.

5	Close the Registry Editor.

To share folders with other users on your network

1	Open My Documents in Windows® Explorer.

2	Click Start, point to All Programs, point to Accessories, and click Windows Explorer.

3	Navigate to the NETLOGON folder.

4	Click Share this folder in File and Folder Tasks.

5	In the Properties dialog box, select Share this folder to share the folder with other users on your network.

Related articles

•	https://support.microsoft.com/en-us/help/2958414/dfs-replication-how-to-troubleshoot-missing-sysvol-and-netlogon-shares

NetLogon service is not running

NetLogon service is not running

Indicates the NetLogon service is currently not running on the domain controller.

Data collector

•	Category: Windows Services

•	Name: Netlogon Windows Service

•	Supported on: Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, and Windows Server 2019

•	Required permissions: When monitored locally, only domain user privilege is required. When monitored remotely, domain administrator privilege is required.

Description

The Directory Analyzer agent periodically checks to ensure that the Net Logon service is running.

Resolution

Use the Services MCC snap-in or another SCP application to restart the Net Logon service.

Orphaned group policy objects exist