I have an application server, running Windows 2012 R2, which generates a high volume of log files, to the point that it runs the application volume out of free space on a semi-regular basis. Due to restrictions from the application itself, I can't move or rename the log files or enable NTFS data-deduplication, and due to it not being ten years ago anymore, I don't want to use a batch or vbscript to do this for me.
The log files are all in various subfolders of the application install directory, with different extensions (one component adds the date as the log file extension), and the application install directory has a space in it, because the application developers are malevolent. The subfolders where the logs are written are exclusively used for the purpose of writing logs, at least. This is also a heavily CPU-bound application, so I don't want to compress the log folders themselves and incur the CPU penalty associated with writing compressed files for the logs.
How can I use PowerShell to enable NTFS compression, in-place, on log files older than x days?