Shared mailbox - junk email - who made these changes

Is it possible to check who added emailadress to the junk emaillist on a shared mailbox?
We have a shared mailbox which has been used by a number of users. We need to prove which of those users with access to that shared mailbox has added emailadresses tot the junk emaillist.
Can the logs prove who did these actions? Can we check which IP-adress made the changes? Can we check which user or IP-adress was active on the webaccount on a certain date? Or any other option that will show who made these changes.
Effect was that important emails of a collegues did not arrive in the inbox and were not followed up on.
Hi @Fjodor73
Do you have any other concern about your question?