Libreoffice on Windows 2008r2, one User more instances

Hello :slight_smile:

we have an Windows 2008r2 Terminal-Server at primary school and there is setuped one user (schueler) in acitve directory. There always about 25 users logged in. So the problem is when more then one user would to start libreoffice you get an errormessage that the programm is still running.
We also another school without AD, only a workgroup but same structure. There it is working fine. So what things are to do that libreoffice is running also fine in AD?

Thanks a lot