Microsoft Outlook 2016 Download Updated 64-bit Link

Ensure you aren't trying to use an Outlook 2013 or 2019 key for the 2016 version.

Create a .xml configuration file specifying OfficeClientEdition="64" . microsoft outlook 2016 download 64-bit

If upgrading, always back up your .pst files to avoid data loss. Common Troubleshooting Ensure you aren't trying to use an Outlook