Azure AD Connect is a tool that integrates your on-premises directories, such as Active Directory, with Azure Active Directory (Azure AD). It allows you to synchronize and manage identities, enabling users to use the same credentials to access resources both on-premises and in the cloud (like Office 365). It also supports features like password hash synchronization, pass-through authentication, and federation.

A simple way to find out the Ad connect / Entra Connect Version is from Powershell command on the server and from the entral/azure portal

Via Powerhell – Server Side

1)Run powerhell as admin, type the commands bellow

A) Import-Module ADSync
B) (Get-ADSyncGlobalSettingsParameter | Where-Object { $_.Name -eq 'Microsoft.Synchronize.ServerConfigurationVersion'}).Value

If the command is ok you will see the info bellow:

From Entra Portal / Azure Portal

Login to entra portal – On the left menu click show more. Then select Hybrid Management – Microsoft entra connect

Now, go to Connect Sync – scroll down to the botom and select Entra Connect Health

Select Sync Services, Press on the Service name on the center of the screen

Select and press the server

Go to properties – Synchronization

The information you are looking for is here !