There is already not enough documentation for us trying to get our heads around Carbonio and it seems that all of the URLs that you had previously had been changed; so maybe you can create 301 redirects to the new resource pages.
So when I search "Carbonio Upgrade" the first search result on Google takes me to https://docs.zextras.com/carbonio-ce/html/upgrade.html
And that is a 404 deadlink... maybe you can create 301 redirects to the new pages.
I wanted to include screenshots hereunder but it seems that I can't.
Screenshots here:-
Did you find it anyway?
https://docs.zextras.com/carbonio-ce/html/install/single-server-installation.html
@hodfords we recently released a new version of docs that has a different structure, so the page you're searching is now at https://docs.zextras.com/carbonio-ce/html/release/upgrade.html
We also added automatic redirects for this release only, so update your bookmarks! 🙂
@stefanodavid Wow! Thanks so much for that!! I can see that Google has picked up on it too