Machine not discovered by Configuration Manager?

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DucheminDominique-7551 asked May 14, '22 DucheminDominique-7551 answered May 15, '22

Machine not discovered by Configuration Manager?

Hello,

I have launched an "Active Directory Group Discovery" as well as "Active Directory System Discovery" but I am still missing some machines after 36 hours!!

Configuration Manager Servers: Windows Server 2016
Client missing: Windows Server 2019 Standard...

I checked the Active Directory Object

and confirmed it is selected:

I checked the group discovery:
201998-2022-05-14-12-00-23-memcm-ad-group-discovery.png

then checked adsgdis.log & adsysdis.log:

I see other machines from the same OU but not the missing ones...

DNS:

I confirmed the Firewall is opened and other machine in the same OU & same subnet are discovered...

What else to be checked...

Thanks,
Dom

mem-cm-general

2022-05-14-11-57-36-vitbmxx01-ad.png (128.6 KiB)

2022-05-14-12-01-56-ad-system-discovery.png (107.7 KiB)

2022-05-14-12-00-23-memcm-ad-group-discovery.png (193.9 KiB)

2022-05-14-11-55-50-vitbmxx01-dns.png (22.2 KiB)

2022-05-14-12-00-23-memcm-ad-group-discovery.png (187.6 KiB)

2022-05-14-17-37-25-vitbmxx01-discovery.png (82.4 KiB)

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Answer 1 · 2022-05-15T04:32:53.183Z

TKujala answered May 15, '22

@DucheminDominique-7551,

I understand.

Have you checked the following process?

Verify an A-record exist in the DNS for the computer that is not getting discovered. Along with A record, verify that a PTR-record also exists in the DNS. Ping the computer from SCCM server so that we know it's reachable/online. Run Nslookup on both sides to troubleshoot DNS issues.

Is that okay?

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Answer 2 · 2022-05-15T03:48:11.63Z

TKujala answered May 15, '22

Hi @DucheminDominique-7551,

You could check the client install logs. Hopefully, it points you in the right direction.

https://docs.microsoft.com/en-us/mem/configmgr/core/plan-design/hierarchy/log-files#BKMK_ClientInstallLog

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Answer 3 · 2022-05-15T04:13:21.81Z

DucheminDominique-7551 answered May 15, '22

Hello,

There no Client log, or Installation Log as the machine is not discovered yet!!!

Thanks,
Dom

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Answer 4 · 2022-05-15T18:27:46.55Z

DucheminDominique-7551 answered May 15, '22 DucheminDominique-7551 edited May 15, '22

Hello,

DNS Records for the Client:
202059-2022-05-15-10-44-23-vitbmxx01-dns-records-a-ptr.png

DNS for the Configuration Manager Server:
202026-2022-05-15-10-56-31-vrpsccmpr01-dns-records-a-ptr.png

Ping from Client to Configuration Manager Server:
202007-2022-05-15-10-53-35-vitbmxx01-to-vrpsccmpr01-ping.png

Ping from Configuration Manager Server to Client:
202067-2022-05-15-11-15-06-vrpsccmpr01-to-vitbmxx01-ping.png

NSLookup from Client to Configuration Manager Server:
202084-2022-05-15-11-05-18-vitbmxx01-to-vrpsccmpr01-nsloo.png

NSLookup Configuration Manager Server to Client:
202075-2022-05-15-11-15-06-vrpsccmpr01-to-vitbmxx01-nsloo.png

Apparently it is okay, let me know if I miss something...

Thanks,
Dom

2022-05-15-10-44-23-vitbmxx01-dns-records-a-ptr.png (18.4 KiB)

2022-05-15-10-56-31-vrpsccmpr01-dns-records-a-ptr.png (16.7 KiB)

2022-05-15-10-53-35-vitbmxx01-to-vrpsccmpr01-ping.png (144.6 KiB)

2022-05-15-11-15-06-vrpsccmpr01-to-vitbmxx01-ping.png (113.9 KiB)

2022-05-15-11-05-18-vitbmxx01-to-vrpsccmpr01-nsloo.png (46.1 KiB)

2022-05-15-11-15-06-vrpsccmpr01-to-vitbmxx01-nsloo.png (43.9 KiB)

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Answer 5 · 2022-05-15T20:45:28.37Z

DucheminDominique-7551 answered May 15, '22

Hello,

Finally after 48 hours the machines appear in the Console - All Systems.... it was long!!!

Thanks,
Dom

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