
Azure Active Directory (Azure AD) Pass-through Authentication allows your users to sign in to both on-premises and cloud-based applications by using the same passwords. Pass-through Authentication signs users in by validating their passwords directly against on-premises Active Directory. This error was because the program did not install correctly. You can read more on Pass-Through Authentication (PTA). Pass-through Authentication is an alternative to Azure AD Password Hash Synchronisation, which provides the same benefit of cloud authentication to organizations. Please visit the following article to learn more about the various methods available for integrating Azure Active Directory with on-Premise Active Directory.
This feature is an alternative to Azure AD Password Hash Synchronization, which provides the same benefit of cloud authentication to organizations. However, certain organizations wanting to enforce their on-premises Active Directory security and password policies, can choose to use Pass-through Authentication instead.

Azure AD Connect Tool status displays inactive
To resolve this issue., simply repair the AD Connect program as described below
– Launch the Windows Control Panel

Click on Program and Features as shown below

This will open the uninstall or change a program window as shown below
– Right click on Azure AD Connect and select repair or click on Azure AD Connect and select repair on the menu

This will launch the change, repair or remove installation window.
– Select on repair and
– Click on Next to continue

Click on Repair as shown below

As we can see below, the Azure AD Connect program is being repaired.

When this steps completes, we should see that the status of the AD Connect Tool on Azure AD will change to active.

I hope you found this blog post on Azure AD Connect Tool status displays inactive helpful. Please let me know in the comment session if you have any questions.