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Home > Software > Microsoft Exchange mail delivery service bugged

Microsoft Exchange mail delivery service bugged

At the start of the new year, Microsoft’s popular e-mail service Exchange has bugged and stopped delivering e-mails.

Rusen Gobel by Rusen Gobel
January 3, 2022
in Software
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Exchange mail service was bugged and stopped working this weekend, beginning the new year, 2022. Microsoft immediately pushed a patch to fix the problem, resulting in a temporary e-mail delivery outage. The malware detection engine causes the problem.

There’s no security risk

According to the Microsoft Blog post for the Exchange 2022 bug, the bug is not related to security even though it happened by the malware detection engine. A bug on the engine was crushing the system in the signature file version checking process, because of the year 2022. As the malware checking engine crushes, the e-mails got stuck in transport queues without causing any security risk.

As a solution, Microsoft recommends downloading a PowerShell-based script that resets the scan engine version. The script needs to be executed on each Exchange mailbox server used to download antimalware updates. The script will change the version of the engine to “2112330001” and it will take a while to deploy.

Click to download ResetScanEngineVersion script

It is also possible to manually fix the problem as Microsoft explains step by step. Here are all the steps you’ll need to follow:

Verify the impacted version is installed

  • Run Get-EngineUpdateInformation and check the UpdateVersion information. If it starts with “22…” then proceed. If the installed version starts with “21…” you do not need to take action.

Remove existing engine and metadata

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

Update to the latest engine

  • Start the Microsoft Filtering Management service and the Microsoft Exchange Transport service.
  • 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

  • In the Exchange Management Shell, run Add-PSSnapin Microsoft.Forefront.Filtering.Management.Powershell.
  • Run Get-EngineUpdateInformation and verify the UpdateVersion information is 2112330001 (or higher)

See more Software News


Tags: Microsoft Exchange Server
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Rusen Gobel

Rusen Gobel

Rusen Gobel is a news editor at Cloud7 News. With more than 10 years of experience, Rusen worked as a hardware and software news editor for technology sites such as Shiftdelete, Teknokolis, Hardware Plus, BT Haber. In addition, Rusen publishes consumer product reviews on his YouTube channel. While consumer electronics has been his main focus for years, now Rusen is more interested in WordPress and software development. He had contributed different web application projects in his professional career. Rusen had graduated from Istanbul University, department of Computer Engineering. Rusen has a very high passion for learning and writing for every kind of technology. That's why he has been working as a tech editor for more than ten years on several different technology magazines and online news portals.

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