Incorporating
I've found this archive to be really useful on multiple occasions.
Looking for one article I came across this post: https://www.betaarchive.com/forum/viewtopic.php?t=38285
in which user '3155ffGd' says:
I've managed to somewhat finish up my Knowledge Base archive.
It contains 213,031 articles spanning the whole time period from the beginning until ~the end of 2007.
Is there some way to incorporate that archive into this one? GitHub seems like an excellent central source for managing this material. That other post just links to an enormous ZIP file which is not nearly as accessible.
Alternatively, there are some mirrors of old Microsoft FTP servers which seem to be far more complete.
E.g. here: https://ftp.zx.net.nz/pub/archive/ftp.microsoft.com/MISC/KB/en-us/