Error code 30015-1007 (123) in Microsoft office 365/2021/2019
In some cases, Office program installation may stop because of several reasons like slow internet, server issues etc. Then your machine creates some of files required to office 365/2010/2016 product.
When you try to re-install this time, You may see issues like these type of office 2019 error code 30015-1007 (123) and different series based on the reason of failure.
You have to delete these Office traces from the computer before trying re-installation process.