If .xls file is open by Libre - MS Excel can open it in full access mode (not read only)

If .xls file is open by Libre - MS Excel can open it in full access mode (not read only). This is a big problem for us - too many users have to work with a few files - some works in MS Windows (MS Excel), others - in Ubuntu (Libre).

Any suggestions how can we resolve access problem? (except installing Libre in MS Windows PC)

How are you sharing those files?

we are sharing them by Samba (we’ve got somthing like file-server)

If you want open in shared mode with both programs, I think there isn’t option, because they have a different lock system to share files.