Machine not discovered by Configuration Manager?

Question

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:

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

Answer 1

@Duchemin, Dominique ,

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?

Answer 2

Hi @Duchemin, Dominique ,

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

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

Answer 3

Hello,

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

Thanks,
Dom

Answer 4

Hello,

DNS Records for the Client:

DNS for the Configuration Manager Server:

Ping from Client to Configuration Manager Server:

Ping from Configuration Manager Server to Client:

NSLookup from Client to Configuration Manager Server:

NSLookup Configuration Manager Server to Client:

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

Thanks,
Dom

Answer 5

Hello,

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

Thanks,
Dom