Categories: MicrosoftNewsSlider

Y2k22 bug is causing Microsoft Exchange Server to fail worldwide: FIP-FS Scan Engine failed to load

Company admins are having their New Year’s celebrations interrupted by reports that their Exchange Servers are failing with the error “FIP-FS Scan Engine failed to load – Can’t Convert “2201010001” to long (2022/01/01 00:00 UTC)“.

The issue appears to be due to Microsoft using the first two numbers of the updated version to denote the year of the update, which caused the “long” version of the date to overflow.

At present, it seems the primary workaround is to disable the anti-malware scanner on the Exchange Server by using Set-MalwareFilteringServer -BypassFiltering $True -identity <server name> and restarting the Microsoft Exchange Transport service.

It appears Microsoft has not acknowledged the issue yet, but if you are affected, some peer support is available at Reddit here.

Update: Microsoft has now acknowledged the issue and is working on a fix. They write:

We are aware of and working on an issue causing messages to be stuck in transport queues on Exchange Server 2016 and Exchange Server 2019. The problem relates to a date check failure with the change of the new year and it not a failure of the AV engine itself. This is not an issue with malware scanning or the malware engine, and it is not a security-related issue. The version checking performed against the signature file is causing the malware engine to crash, resulting in messages being stuck in transport queues.

On the coming fixes, they say:

Our engineers were working around the clock on a fix that would eliminate the need for customer action, but we determined that any change that did not involve customer action would require several days to develop and deploy. We are working on another update which is in final test validation. The update requires customer action, but it will provide the quickest time to resolution.

In the meantime, Microsoft says if you have other ways of sanitizing your email, such as routing them through exchange online, you can use the following methods to disable the malware scanner:

Update 2:  An official fix is now available from Microsoft, which involved stopping and updating the Microsoft Filtering Management service and updating the engine to the latest version.

Remove existing engine and metadata
1. Stop the Microsoft Filtering Management service.  When prompted to also stop the Microsoft Exchange Transport service, click Yes.
2. Use Task Manager to ensure that updateservice.exe is not running.
3. Delete the following folder: %ProgramFiles%\Microsoft\Exchange Server\V15\FIP-FS\Data\Engines\amd64\Microsoft.
4. Remove all files from the following folder: %ProgramFiles%\Microsoft\Exchange Server\V15\FIP-FS\Data\Engines\metadata.

Update to latest engine
1. Start the Microsoft Filtering Management service and the Microsoft Exchange Transport service.
2. Open the Exchange Management Shell, navigate to the Scripts folder (%ProgramFiles%\Microsoft\Exchange Server\V15\Scripts), and run Update-MalwareFilteringServer.ps1 <server FQDN>.

Verify engine update info
1. In the Exchange Management Shell, run Add-PSSnapin Microsoft.Forefront.Filtering.Management.Powershell.
2. Run Get-EngineUpdateInformation and verify the UpdateVersion information is 2112330001.

After updating the engine, we also recommend that you verify that mail flow is working and that FIPFS error events are not present in the Application event log.

Microsoft has also released a script at that automates the process and runs parallel over all your servers.

Read all the associated detail at Microsoft here.

Thanks, Ola, for the tip.


Recent Posts

Apple’s iPhone 14 Pro will reportedly have these new features

Apple has started testing iOS 16 with beta testers, but there are certain features that the company doesn't want to…

2 hours ago

Microsoft Surface Go 2 starts getting June 2022 firmware update

Microsoft has started rolling out June 2022 firmware update to Surface Go 2 devices, though it doesn't include new features…

2 days ago

Microsoft releases Windows 10 Build 19044.1806 to Release Preview Channel

Microsoft has released Windows 10 21H2 Build 19044.1806 (KB5014666) to the Release Preview Channel for those Insiders on Windows 10.…

2 days ago

Microsoft releases Windows 11 Cumulative Update Build 25145.1011 (KB5016159) for Dev Channel Insiders

Microsoft has released a Windows 11 servicing Build 25145.1011 (KB5016159) for Windows 11 Insiders in Dev Channel. As expected, the…

3 days ago

Threats of Wave Browser: What can it do and how to completely remove it?

In these modern times, exploring the web always poses risks to all users. This is why different tech companies keep…

3 days ago

iOS 16 edit iMessage feature may not work on older phones

The option to edit text messages in the iMessage app was one of the features Apple highlighted during the announcement…

3 days ago