However we do find that if the default file location is changed to documents or something other than deep within the library folder it works more consistently.
We have found though that this can be hit or miss of actually autosaving the files as we have had multiple peoples office crash and lose all their work (they should have saved but they didn't) and it not show up in the autosave default location. It saves deep within the libary/containers.so on. We have had issues with out autosave functionality when the file location is set to the default location. If the user Documents folder works for you, then you’re all set. The default save location is your user Documents folder. This will tell Word, Excel, or PowerPoint that you want your documents to be saved to your computer, or a network-attached volume, instead of an online service like OneDrive.