How can I migrate Azure AD Connect version 1x to 2x while version 1x was stopped working

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How can I migrate Azure AD Connect version 1x to 2x while version 1x was stopped working

Dong, Nguyen Ngoc 20

Hi Mate,

I have an AzureAD Connect server (OS 2012) still running version 1.1 but it stopped working on 27Oct2023, and now I can not switch the server to stagging mode via GUI due to it can not start connecting or synchronizing to MS Azure service.

I used PS script to export the current config from the old to the new AzureAD Server ver 2.2.80 (OS2019), successfully imported and ran the new server to staging mode.

So, now my question is how to make the old server in staging mode by Powershell or from the Entra portal.

Much appreciate your help...

Thank you

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Answer 1

Domooney-MSFT 2,606 Microsoft Employee

Hi Dong,

You can simply uninstall Azure AD connect from the old server, and then delete it from the Azure AD portal, if you navigate here and click on the "Service Name" - https://portal.azure.com/#view/Microsoft_Azure_ADHybridHealth/AadHealthMenuBlade/~/SyncServicesList

You should see both servers listed, and you can delete the old / decommissioned server.

Let me know if you have any queries or this does not work for any reason and I would be happy to help!

Please "Accept the answer" if the information helped you. This will help us and others in the community as well.

Dong, Nguyen Ngoc 20 Reputation points

2023-12-17T23:29:52.15+00:00

Hi Domooney,

Thank you so much for your reply.

I just want to know for sure whether the users that are already synched to MS365 to be deleted or changed to Cloud users after I uninstall the old one.

After uninstalling the old one and deleting it from Entra I can switch my new one to Active mode, right?

Thank you so much for your support
Dong, Nguyen Ngoc 20 Reputation points

2023-12-20T09:24:47.3133333+00:00

Thank you so much for your advice @Domooney-MSFT

Your guide works for me, everything is good now.

Thank you
Domooney-MSFT 2,606 Reputation points Microsoft Employee

2023-12-20T09:45:27.6166667+00:00

Hi Dong, that's great, I'm happy to hear it!

Apologies I missed your last message, but the users should not be deleted or become cloud users if you un-install an AD Sync server, if you took users out of scope from sync while the server was active, it would delete them. And if you disabled sync on your tenant via PowerShell and waited 2-3 days they would become cloud users.

Let me know if you have any further queries :)

Kind Regards,

Donal

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How can I migrate Azure AD Connect version 1x to 2x while version 1x was stopped working

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