"Unable to retrieve the Azure Active Directory configuration." error when using MS Azure AD Connect

Question

Using Windows 2012 R2 AD and I want to connect Entra to the current AD.

I have an old client version of Azure AD Connect installed but when I try to connect using my credentials the error "Unable to retrieve the Azure Active Directory configuration." displays.

TLS 1.2 set up
There are no blocks set up in Entra currently to prevent a connection afaik

This is the top portion of the even log regarding the failure:

" ProvisioningWebServiceAdapter::ExecuteWithRetry: Action ProvisioningWebServiceAdapter::GetCompanyConfiguration, Exception: Microsoft.Online.Coexistence.ProvisionException: An error occurred. Error Code: 38. Error Description: This version of the Identity synchronization tool is not supported. You may be running an older version of the Identity synchronization tool. Make sure you are running the latest version. You can obtain the latest version by downloading it from the Identity synchronization page in your Admin Portal. If the error persists, contact Technical Support. Tracking ID: 51fbfaa8-94da-4e9e-a406-e9445c7112be Server Name: . ---> System.ServiceModel.FaultException`1[Microsoft.Online.Coexistence.Schema.AdminWebServiceFault]: This version of the Identity synchronization tool is not supported. You may be running an older version of the Identity synchronization tool. Make sure you are running the latest version. You can obtain the latest version by downloading it from the Identity synchronization page in your Admin Portal. If the error persists, contact Technical Support. "

I realize I am running an older version of the client. The question is, has Microsoft fully blocked the older clients or is there some workaround that I might be able to deploy. I plan to upgrade the servers. I just need a month or two more with the current servers. Is that possible?

Answer 1

Hello @Will Wright - onmicrosoft

Based on the error message you provided, it seems that the version of the Identity synchronization tool you are using is not supported.

It is recommended to use the latest version of Azure AD Connect to ensure compatibility and security. However, if you need to continue using the older version for a short period of time, you can try the following workaround:

1. Download the latest version of Azure AD Connect from the Microsoft Download Center.
2. Install the latest version of Azure AD Connect on a separate server.
3. Configure the new Azure AD Connect server to use the same settings as the old server.
4. Once the new server is configured, you can switch the DNS records to point to the new server.
5. Decommission the old server once you have confirmed that the new server is working correctly. This workaround will allow you to continue using the older version of Azure AD Connect for a short period of time while you prepare to upgrade to the latest version.

Please note that using an unsupported version of Azure AD Connect can pose security risks and may cause compatibility issues. It is recommended to upgrade to the latest version as soon as possible.

---

I hope that this response has addressed your query and helped you overcome your challenges. If so, please mark this response as Answered. This will not only acknowledge our efforts, but also assist other community members who may be looking for similar solutions.

Answer 2

@Will Wright - onmicrosoft

Thank you for posting this in Microsoft Q&A.

Currently, we do not have any work arounds to make the older version Entra connect to work.

The one-year advanced notice of Azure AD Connect V1's retirement was announced in August 2021. As of August 31, 2022, all V1 versions went out of support and were subject to stop working unexpectedly at any point.

On October 1, 2023, Microsoft Entra cloud services stopped accepting connections from Azure AD Connect V1 servers, and identities will no longer synchronize.

If you are still using Azure AD Connect V1 you must take action immediately.

You can consider below information to get more information,

Title	Description
Information on deprecation	Information on Azure AD Connect V1 deprecation
Information on deprecation	Information on Azure AD Connect V1 deprecation
What is Microsoft Entra Connect V2?	Information on the latest version of Microsoft Entra Connect
Upgrading from a previous version	Information on moving from one version of Microsoft Entra Connect to another

All Microsoft Entra Connect Sync 1.x versions are unsupported and synchronization does not function. Customers using cloud sync or supported versions of Microsoft Entra Connect 2.x remain fully operational. For more information about the retirement of all 1.x versions, see Decommission Azure AD Connect V1.

Versions of Microsoft Entra Connect Sync 2.x retire 12 months from the date that a newer version is released. This policy went into effect on 15 March 2023.

For new installs, always install the latest version. For upgrades, make sure you upgrade to the latest version prior to the retirement of your current version.

If you run a retired version of Microsoft Entra Connect, it might unexpectedly stop working. You also might not have the latest security fixes, performance improvements, troubleshooting and diagnostic tools, and service enhancements.

Let us know if you have any further questions.

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