I understand we're authorised to use BiaB only on one computer at a time, though it can be installed on two or three computers at the same time. That said, I've occasionally used two copies at once when diagnosing problems, or to have a large screen for editing a song whilst using my notepad PC for practice (it's a tiny screen that's a pain to use). (*)

I run BiaB on my home office machine in either Windows or in Wine on Linux, with the while of /bb/ on a drive F: and I find that when I rebuild the styles database on one platform, the other platform then asks for a rebuild. I imagine similar would happen with Onedrive.

As I understand BiaB's behaviour, it does some file generation/swapping in the /bb/ directory, so it's possible that using Onedrive for /bb/ might result in, e.g., slow generation.

You have a maximum of three activations available. If you wish to activate a fourth machine, you must first deactivate one of the first three.

An alternative arrangement might be to keep just your songs on Onedrive and the rest of BiaB on the machine(s).

(*) For another software package I have I asked a similar question of that vendor about occasional use of two copies simultaneously. Their answer was that it's tracked but they don't really mind licensed users doing that ... "what we're really worried about is millions of users in China using ripped-off copies".

Caveat: these are mostly my opinions/understandings of the situation.

Jazz relative beginner, starting at a much older age than was helpful.
AVL:MXE Linux; Windows 11
BIAB2025 Audiophile, a bunch of other software.
Kawai MP6, Ui24R, Focusrite Saffire Pro40 and Scarletts
.