I did check that. That same page has a matrix which doesnt mention version 5.5
Also i tried to go to package share, download the sharepoint connector through there, install it through package manager.
It all went through fine.
But like the documentation says, I do not get any link for Sharepoint connector on the home/welcome page.
Please let me know if I am missing someting.
Get in touch with Adobe to get more information about it. I would recommed to create a daycare ticket.