Microsoft no longer provides standard security patches or technical support for this version.
refers to an early preview version (Version 1805) of the perpetual Office 2019 suite . This specific build was part of the Perpetual Enterprise Client Update program, designed for volume license users like those with Office Professional Plus 2019. Key Details for this Build Version: 1805 Microsoft Office 2019 Build 16.0.9330.2087 x64 ...
x64 (64-bit), which is recommended for devices with at least 4 GB of RAM. Microsoft no longer provides standard security patches or
About Office: What version of Office am I using? - Microsoft Support Microsoft Office 2019 Build 16.0.9330.2087 x64 ...