SCOM 2019 side-by-sdide migration - agent upgrade from 2012 R2

Question

Hi all,
Existing SCOM 2012 R2 environment - moving to SCOM 2019.

Using a new 2019 server - so a side-by-side upgrade.

Have installed 2019, imported all management packs, worked out what custom rules, monitors, notifications etc etc are needed and bought them across etc... which i thought was the hard bit (and it was)

When starting to move clients across using client discovery/install, i am getting the error
"OmAgentFunctions::IsUpgradeSupported : Version prior to OM 2016 RTM found, upgrade is not supported."

Which makes sense - as the client version is 2012 R2.

Given that there are some witty people around, im wondering if anyone has developed a nice method of handling this? I can use SCCM to uninstall the agent - but really would prefer it was all handled within SCOM.

Answer 1

HI @Ben Wosjke ,

A side-by-side-migration from SCOM 2012 R2 directly to SCOM 2019 is not officially supported, but of course possible to achieve.
The best way to actually accomplish this would be to first in-place upgrade your SCOM 2012 R2 to SCOM 2016.

Then upgrade all your SCOM agents to the 2016 version, after that you can perform a side-by-side migration and you can upgrade the SCOM agents.

Some useful links:

Upgrade from SCOM 2012R2 to SCOM 2016 Checklist
https://kevinholman.com/2020/05/25/upgrade-from-scom-2012r2-to-scom-2016-checklist

Upgrade from SCOM 2016 to SCOM 2019 Checklist
https://kevinholman.com/2021/01/13/upgrade-from-scom-2016-to-scom-2019-checklist

The following management pack by Kevin can help you in uninstalling/installing mass SCOM agents:
https://kevinholman.com/2017/05/09/scom-management-mp-making-a-scom-admins-life-a-little-easier

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Best regards,
Leon

Answer 2

Hi,

Since the current SCOM 2012R2 is still working, we may build a list of all the monitored computers, and then using the example below to loop this cmdlet, in order to remove all the agents.

Get-SCOMAgent -DNSHostName "server01.contoso.com" | Uninstall-SCOMAgent

If the SCOM 2012R2 is not working, to uninstall the agent, we may use similar commands as below example via configuration manager or something equivalent:

%WinDir%\System32\msiexec.exe /x <path>\MOMAgent.msi /qb

Hope the above information helps.

Regards,

Alex Zhu

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Answer 3

Hi,

It seems there is no update for a couple of days. May we know the current status of the problem? Is there any other assistance we can provide?

Regards,

Alex
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