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Exchange 2016 Antimalwarescanning Antimalware scanning FIPFS issues
Hi MSFT Exchange Team, Most of the on-premise Exchange 2016, 2019 customers facing suddenly mail flow issues as they cannot send/receive emails. Fix is Set-MalwareFilteringServer -BypassFiltering...
- The official fix has been released here: https://techcommunity.microsoft.com/t5/exchange-team-blog/email-stuck-in-exchange-on-premises-transport-queues/ba-p/3049447
Exactly the same problem !!!
I spent a few hours before finding the solution and identifying the cause of the email blocking.
After deactivating the spam filter, my emails came back.
The most worrying thing is knowing that it is the first day of the year and that there is already a major bug ...
I started seeing the same problem across 3 separate Exchange environments starting 12/31 between 12:30pm-4pm Pacific time. Exchange 2016 and 2019. Running different types of EDR/AV. Followed the below article until I came to the same conclusion of disabling malware filtering. I agree this is a less than ideal workaround.