Trash in FortiMail Personal Quarantine missing

Hi,

our FortiMail operates in gateway mode. When users are logged into their personal quarantine and delete a mail from the inbox a notification pops up telling users that the mail has been moved to trash. However, users do not see a trash folder.

I've talked to other users of other FortiMail customers and some have a trash in their personal quarantine. They do not know why though. I explored all clickable UI features within the personal quarantine and also went through the FortiMail documentation but found nothing about this topic. That's why I decided to share this with the community.

Any ideas why this is, are highly appreciated. Thank you.