The COM-based Outlook Object Library is not supported on macOS.
If you are looking for a "dll download" for this library, it is important to understand that Microsoft does not provide it as a standalone file. Instead, it is part of the , 2019 , or Microsoft 365 installation. Where to Find the Library on Your Computer microsoft outlook 16.0 object library dll download
Open your Office application (Excel, Access, etc.) and press to open the VBA Editor. Go to Tools > References . The COM-based Outlook Object Library is not supported