Probably related Reddit thread
https://www.reddit.com/r/sysadmin/comments/rt91z6/exchange_2019_antimalware_bad_update
Appears to be related to the long signed integer value for version numbers
allowing values only up to 2,147,483,647 - so when version numbers for the
malware/inline virus scanner
People.
There appears to a y2k22 bug in Exchange servers - and its fairly nasty. As
of midnight UTC, the Filtering Service stopped passing emails, email goes in
- and never gets delivered to the mailbox. Easiest thing to look for in the
event logs:
The FIP-FS Filtering Management Service was
