It's an option to store your keys on their server, but not a requirement. At least not the last time I set up BitLocker. In fact that computer didn't even have

It's an option to store your keys on their server, but not a requirement. At least not the last time I set up BitLocker. In fact that computer didn't even have the on board Secure Storage thing that it prefers, so I had to make a note of the recovery key on paper.