During the scan some trojans were detected. I choose the 'proper action' option and after that all my mail was missing.
I could recover the pst files from the events menu in BD but the custom folders I had made in Outlook were still gone.
I use a mail folder named 'keep' for important content. That was gone too 
I had a 2 months old backup of the pst file so the damage is 2 months.
Why does BD remove the complete pst files when there is a suspicious mail?
Is there a way to prevent this from happening?
Regards,
Ton