ALL emails marked as SPAM - Message detail removed

I am in a panic... Since November 3rd, every single email that comes into my Outlook folder is marked as *****SPAM*****, even emails that are clearly NOT spam.  I've missed important meeting info and client emails... I am using Microsoft Outlook 2016 and Norton Antivirus 22.8.0.50 on Windows 10.  I've turned off Anti-Spam in Norton and turned off Email Protection... all emails still come in as SPAM with no message attached. I've scanned for viruses - NOTTA, I've repaired my email folders - did not fix the problem.  Help! I'm desperate.