macOS (optimized for both Intel and Apple Silicon Macs via Universal binaries).
This version was part of the "New Outlook" transition period for Mac users. Microsoft Outlook 2019 VL v16.45
Volume License (VL), typically used by organizations via a Volume License Serializer . Notable Features in Version 16.45 macOS (optimized for both Intel and Apple Silicon
Enhanced sync technology for Microsoft 365, Outlook.com, and Gmail accounts, resulting in faster mail delivery and calendar updates. and Gmail accounts
End of support for Office 2016 and Office 2019 | Microsoft Support