Unable to Install the Synchronization Service when setting up Microsoft Azure AD Connect

JVelocity 0 Reputation points
2023-06-23T19:29:17.8333333+00:00

Hello,

I'm trying to install Microsoft Azure AD Connect on a file server running Server 2019 Version 1809. Currently AD Connect is setup and working on our DC but we're trying to set it up on our File server instead.

When trying to configure Azure AD Connect it always receive a error stating "Unable to Install the Synchronization service." This occurs both when doing an Express Install and when trying to do a custom install by importing the settings that have been exported from the install present on the DC.

Attached are the error logs. Synchronization Service_Install-20230623-141323.log

Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
3,464 questions
Microsoft Entra ID
Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
19,522 questions
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3 answers

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  1. Eric cao 0 Reputation points
    2023-06-23T20:27:34.18+00:00

    Hi,

    The installation might be corrupt. This has been also identified with “lost service id” while you re-enable the connection between your AD DC to the global directory. 
    You can try to re-install Azure AD Connect. If it doesn't work.

    Download The Program Install and Uninstall troubleshooter from the link below.

    Open the troubleshooter, click next -uninstalling-Select Azure AD Connect-Yes, try uninstall, and following the rest step to uninstall it.

    After that, go to Regedit, HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products

    Find the folder AF12EE9B0A6277046A0C7C4BB424D97D, and check if the product name is Azure AD Connect.

    User's image

    Delete that entry, restart your server, and reinstall the Azure AD connect.

    Please take a moment to "Mark as Answer" and/or "Vote as Helpful" wherever applicable. Thanks!

  2. Givary-MSFT 28,061 Reputation points Microsoft Employee
    2023-06-26T09:26:17.08+00:00

    @JVelocity Thank you for reaching out to us, As I understand you are trying to install Azure AD Connect setup on Server 2019 operating system and unable to install it successfully, from the logs (shared in the question) - MSI (s) (88:FC) [14:13:23:816]: Product: Microsoft Azure AD Connect synchronization services -- Error 1723.There is a problem with this Windows Installer package. A DLL required for this install to complete could not be run. Contact your support personnel or package vendor. Action CheckFileSystem, entry: CheckFileSystem, library: C:\WINDOWS\Installer\MSI111C.tmp

    It seems there is an issue with the corrupt installation, found this post where similar error/issue has been addressed.

    https://answers.microsoft.com/en-us/msoffice/forum/all/removing-azure-active-directory-synchronization/1b32695b-93c4-4c53-87eb-3cf16e8e907a

    Would recommend to follow these steps and check if it helps to resolve this issue.

    Let me know if you have any further questions, feel free to post back.

    Please remember to "Accept Answer" if answer helped, so that others in the community facing similar issues can easily find the solution.

  3. Dennis Salazar 0 Reputation points
    2024-04-18T03:19:57.06+00:00

    Hi, I would like to ask if this is issue has been resolved?

    Because I had same problem at AD sync.

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