FIP-FS Scan Engine

FIP-FS is probably the anti-malware virus scanner that has been on board since Exchange Server 2013. This is supposed to scan the on-premises Exchange Server installation for malicious content. This anti-malware scan engine seems to cause problems the problem.

Temporary Solution is to disable anti-malware filter . You can disable it as below

Set-MalwareFilteringServer exch-19 -BypassFiltering $true

Happy New Year 😊