Using the New Outlook for Mac for personal email and calendar
Welcome Hamdi Sellami,
I understand how concerning it is to suddenly find the entire Junk Email folder empty, especially after you were unable to get assistance through chat.
Please try the step below:
- Sign in to Outlook.com from a web browser and open the Junk Email folder. Let me know whether the missing messages appear there.
- Check Deleted Items as well. If the messages are not there, select Recover items deleted from this folder and see whether any of the missing messages are available for restoration.
- Please also let me know approximately how old the missing junk messages were.
Please let me know what you see in Outlook.com, and we can continue from there.