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

Question

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

JVelocity 0

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

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Answer 1

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Answer 2

Givary-MSFT 35,621 Microsoft Employee Moderator

@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.

JVelocity 0 Reputation points

2023-06-26T15:00:21.35+00:00
The issue that I'm experiencing is not quite the same. I can uninstall Azure AD Connect from Control Panel without any issues. I've done a clean reinstall of the program (even checking the Registry to make sure that there are no lingering keys) multiple times but it always gives an error when trying to install the Synchronization Services.

Some other things that myself and a team member have tried:

Ran full Windows Updates

sfc /scannow

DISM.exe /Online /Cleanup-image /Scanhealth

DISM.exe /Online /Cleanup-image /Restorehealth

DISM.exe /online /cleanup-image /startcomponentcleanup

chkdsk c: /f

Uninstalled/Reinstalled AD Connect with the mayse\velocityit, mayse\administrator, and local administrator accounts.

Given "Everyone" full control access to the c:\users%USERNAME%\appdata\local\temp directory

Verified the latest version of .NET framework is installed

Verified the latest version of AD Connect PS Module is installed.

Verified that I am able to manually connect to their MS Azure Tenant via AD Connect PS Module.

Uninstalled and reinstalled latest versions of MS C++ Redistributable

Reran sfc /scannow and dism.exe /online /cleanup-image /scanhealth -- no errors detected.

Performed a clean boot (msconfig.exe > Selective Startup) and attempted installation.
JVelocity 0 Reputation points

2023-06-26T15:03:10.7466667+00:00
The issue I'm experiencing is different from the one that you've linked. I can uninstall and reinstall Azure AD Connect without any issues. The issue comes about whenever you try to run Azure AD Connect and it tries to install the Synchronization Services. The error always occurs at this point.

Some other things that myself and a colleague have tried:

Ran full Windows Updates

sfc /scannow

DISM.exe /Online /Cleanup-image /Scanhealth

DISM.exe /Online /Cleanup-image /Restorehealth

DISM.exe /online /cleanup-image /startcomponentcleanup

chkdsk c: /f

Uninstalled/Reinstalled AD Connect with the mayse\velocityit, mayse\administrator, and local administrator accounts.

Given "Everyone" full control access to the c:\users%USERNAME%\appdata\local\temp directory

Verified the latest version of .NET framework is installed

Verified the latest version of AD Connect PS Module is installed.

Verified that I am able to manually connect to their MS Azure Tenant via AD Connect PS Module.

Uninstalled and reinstalled latest versions of MS C++ Redistributable

Reran sfc /scannow and dism.exe /online /cleanup-image /scanhealth -- no errors detected.

Performed a clean boot (msconfig.exe > Selective Startup) and attempted installation.

Answer 3

Dennis Salazar 0

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

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