Exchange Y2KK Bug

KB ID 0001769

Y2KK Problem

Over the last couple of days the Exchange forums have been alight with the Y2KK bug, typically it affects Exchange 2016 and 2019 (though the chatter is, it actually effects any Exchange versions whose update version begins with 22…

Y2KK Get Exchange update Information

This is fine below, (it begins with 21..)

Get Exchange update Information2

Add-PSSnapin Microsoft.Forefront.Filtering.Management.Powershell

Y2KK Symptoms 

Emails No Longer Being Delivered!

Event ID 5300

Log Name: Application 
Source: FIPFS 
Logged: 1/1/2022 1:03:42 AM 
Event ID: 5300 
Level: Error 
Description: The FIP-FS "Microsoft" Scan Engine failed to load. PID: 23092, Error Code: 0x80004005. Error Description: Can't convert "2201010001" to long.

Event ID 5300 Y2KK

Event ID 1106

Log Name: Application 
Source: FIPFS 
Logged: 1/1/2022 11:47:16 AM 
Event ID: 1106 
Level: Error 
Description: The FIP-FS Scan Process failed initialization. Error: 0x80004005. Error Details: Unspecified error.

Event ID 1106 Y2KK

Error “Message Deferred By Categorizer Agent”

Messages seen stuck on message queues, with this error.

Message deffered by catagorizer agent

Y2KK Solution

Note: To avoid an error, ensure your PS Execution policy is set to Remote-Signed before attempting to run the following script or it will simply throw you an error.

Set-ExecutionPolicy -ExecutionPolicy RemoteSigned

See this article for more information.

The simplest fix to this problem is to run the script that Microsoft have provided Reset-ScanEngineVersion.ps1

Note: This needs to be RAN on EACH Exchange server, (with the Exception of Edge Transport Servers).

Y2KK Fix

You can apply the ‘fix‘ manually, instructions for doing so are on the link at the bottom of the page.

Update 04/01/21: You may need to disable all the transport rules before the queues will clear. (untested)

Related Articles, References, Credits, or External Links

Email Stuck in Exchange On-premises Transport Queues

Author: PeteLong

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