Exchange: Bypass Malware Filtering

You can apply the following solution to resolve the issue affecting mail flow on exchange servers on the first day of 2022.

The server name should be written in the part that says ServerIdentity.

Set-MalwareFilteringServer <ServerIdentity> -BypassFiltering $true

Restart-Service MSExchangeTransport

To check

Get-MalwareFilteringServer | Format-List BypassFiltering