25,081 questions
Are you installing version 1.5.45?
That is no longer supported:
Make sure you installing the latest version and on a supported O/S
- Azure AD Connect must be installed on a domain-joined Windows Server 2016 or later. We recommend using domain-joined Windows Server 2022. You can deploy Azure AD Connect on Windows Server 2016 but since Windows Server 2016 is in extended support, you may require a paid support program if you require support for this configuration.