Problems with reinstall Azure AD Connect

Gert Baauw 0 Reputation points

We had an Azure AD connect running on a server 2022. This got corrupted by a dll file. Now we want to redo the installation after manually uninstalling the software, but we cannot get any further when creating the synchronization account. The error message is: Unable to create the Azure Active Directory synchronization service account. You may be able to resolve the issue by performing the operation again.

If I do this, it still does not resolve after 4 times. If I close the installer (I had that last time) I can never get into it again. In other words, I am now at a fixed point.

Any idea how I can solve this?

Kind regards, Gert

Azure Active Directory
Azure Active Directory
An Azure enterprise identity service that provides single sign-on and multi-factor authentication.
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  1. Michael Smith-MSFT 941 Reputation points Microsoft Employee

    Hi @Gert Baauw

    Thank you for reaching out to the community.

    This can happen if there CA policies being applied the sync service account.

    Can you check if your CA policies are triggering MFA for the service account and then exclude the service account from the policies?

    Please don’t forget to "Accept the answer" and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.

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