Azure AD Connect unavailable to validate credentials

It’s time to upgrade Microsoft Azure Active Directory Connect. Unfortunately, we cannot connect to Azure AD with our Azure AD global administrator credentials in the upgrade setup wizard. An error appears that it’s unavailable to validate credentials due to an expected error. In this article, you will learn why this is happening, and the solution for Azure AD Connect unavailable to validate credentials.

Azure AD Connect unable to validate credentials due to an unexpected error

When we start the Azure AD Connect installation and enter the Azure global administrator credentials to upgrade Azure AD Connect, we get the error Unable to validate credentials due to an unexpected error.

Let’s look at how to prevent this error from appearing so we can proceed with the Azure AD Connect upgrade.

Solution for Azure AD Connect unable to validate credentials due to an unexpected error

To fix Azure AD Connect unavailable to validate credentials due to an unexpected error, follow the below steps:

1. Start Command Prompt as administrator.

2. Change the directory to the Microsoft Azure Active Directory Connect folder.

cd "C:\Program Files\Microsoft Azure Active Directory Connect"

3. Run the AzureADConnect.exe /InteractiveAuth command.

AzureADConnect.exe /InteractiveAuth

It will look like the below screen.

4. The Upgrade Azure Active Directory Connect window appears. Click Upgrade.

5. Fill in the Azure AD global administrator account and click Next.

6. The modern authentication window appears. Fill in the password and click Sign in.

7. Click on Upgrade to upgrade Azure Active Directory synchronization.

Azure AD Connect did successfully upgrade. Did it work for you?

Read more: Install and configure Azure AD Connect »

Conclusion

You learned why Azure AD Connect shows the error unavailable to validate credentials due to an unexpected error. The solution to this error is restarting Azure AD Connect with the /InterActiveAuth option. After that, you can upgrade Azure AD Connect.

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