For some reason unknown I just can't find a good techical explanation of how exactly Office 365 functions, and, particularily, can I completely disable all kinds of local caching/syncing/downloading/whatever, and still get a functional solution?
This is an important question as I'm currently evaluating a possibility of migration to Office 365 for a group of people who work with an extremely huge amount of documents (~1TB). They need all of them accessible all the time on all their devices, including smartphones and tablets with limited storage capacity. They also don't want to put up with time overheads imposed by downloads/syncs (they tried some kind of cloud storage software before, which would download requested file to device's drive before opening it, and it presented them with a delay of around 10 seconds for accessing a 2MB file over the 40Mb link, and thats unacceptable for them).
They work with files using Microsoft Office solutions, so Office 365 is the most attractive answer to the problem which I would like to consider before getting my hands really dirty and moving to terminal service approach.
The other question is can I use some other cloud storage service with Office 365? If I got it right, it comes with OneDrive for Buisness as a cloud storage solution, but can I choose the one from amazon, or google instead (while still using Microsoft's apps)?