Share synced library among different windows accounts

You have multiple Windows accounts use the same locally synced OneDrive for Business folder on the same machine — runs into a hard design limitation in the OneDrive client.

The OneDrive sync client keeps a per-Windows-user configuration.

Each Windows account keeps its own synced copy of the library.

Or, everyone accesses the shared files directly in SharePoint/OneDrive web without syncing.

Or, use a network share (SMB) that points to a server copy of the library (not synced locally by OneDrive on that machine, but hosted somewhere else that is synced).

There’s no supported way to have two separate Windows accounts using the same physical synced OneDrive/SharePoint folder…so far I know.

If I may recommend

For stability and data safety, let only one Windows account run OneDrive sync to that folder, then share the folder via Windows file sharing to other accounts on the same PC (or over the network).

This preserves:

Single sync database (no conflict fights).

Same physical copy of files.

Same folder path on disk.

No wasted space from duplicate local copies.

Hope this helps you a little