Topic: logfile on the access to an i-bay?

[mastr]

Hello,

We use the SME-server at our school.
Students have an account and belong to a group "student". Teachers also have an account and belong to a group "teacher".
We defined an i-bay to use as a shared network drive. The group "teacher" has write access, the group "student" read access.
We suspect to have a "bad" user (a student that misuses a teacher account?): files that were put by a teacher disappear in a mysterious way.
Is there a possibility to find a track of this behaviour? Can we look at a certain logfile?
Thanks for your patience.
Marleen