Microsoft EntraID to AD and AD to EntraID

Question

Currently I have installed on a test AD the domain that was previously sync towards EntraID. All worked fine on the old domain. But once I needed for technical reasons, to recreate the domain on a new AD instance. And I install the AADConnect on the new ad, and create the cloud sync configurations. I could select my AD server and define a sync. But know the services are going constantly in "provisioning quarantine", and without a logging. How can I find where my bottleneck is ?

Answer 1

Did you remove the previous sync agent config from Entra?

https://learn.microsoft.com/en-us/answers/questions/982122/remove-azure-ad-cloud-sync-agent

You may need to remove that and start over.

Answer 2

The microsoft AD doesn't exist anymore. And yes, I tried to remove both already multiple times. I am quite sure that the old sync is no long available. The problem is too that when I try to do a trial sync. I get a time-out. While the agent is correctly shown up in the list. So the communication should be correct from my AD on prem towards the Azure Entra ID. The logging is also empty, so I do not see on which port he tries to connect, or which action times out.