unable to install CU

Question

Hi All, I am trying to upgrade Exchange Server 2016 to the latest CU. I am currently on Exchange Server 2016 CU23 Nov23SU and attempting to upgrade to Exchange Server 2016 CU23 Nov24SUv2. However, I am encountering the following error. Please guide me.

Answer 1

It looks like you're hitting the file version error that’s been reported with the November 2024 Security Update (SU) for Exchange 2016/2019. This issue prevents the update from installing and can also lead to error 1603 on retry attempts.

Workaround Steps:

-Restart your Exchange server and check if services are disabled:

Get-Service -DisplayName "Microsoft exchange*" | ft DisplayName,Starttype,Status

If any services are Disabled, restore them using:

cd "C:\Program Files\Microsoft\Exchange Server\V15\Bin"

Add-PSSnapin -Name Microsoft.Exchange.Management.PowerShell.Setup -ErrorAction SilentlyContinue

.\ServiceControl.ps1 AfterPatch

-Ensure .NET Framework 4.8 is installed

Get-Hotfix

If missing, install the latest .NET 4.8 update for your Windows version (Windows Updates here).

-Manually stop Exchange services before retrying the update:

Add-PSSnapin Microsoft.Exchange.Management.PowerShell.Setup

$serviceControlPath = Join-Path $env:ExchangeInstallPath '\Bin\ServiceControl.ps1'

& $serviceControlPath -Operation 'Stop' -Roles 'LanguagePacks'

-Check for locked files using Process Explorer (Download here):

Search for Microsoft.Exchange.Data.Common.dll

If any process has it locked (e.g., antivirus), stop that process.

-Retry the SU installation and verify Exchange health after completion.

For more details, check Microsoft’s official workaround:

https://support.microsoft.com/en-us/topic/file-version-error-when-you-try-to-install-exchange-server-november-2024-su-a650da30-f8fb-469d-a449-47396cab0a15

Let us know if you’re still stuck!

Answer 2

Hello, @Glenn Maxwell,

Welcome to the Microsoft Q&A platform!

The error code HRESULT: 0x800700B7 typically indicates a problem with the installation process.

In order to resolve this issue, it is advisable for you to visit File version error when you try to install Exchange Server November 2024 SU - Microsoft Support for reference.

Should you need more help on this, you can feel free to post back. 

---

If the answer is helpful, please click on “Accept answer” as it could help other members of the Microsoft Q&A community who have similar questions and are looking for solutions.

Thank you for your support and understanding.

Best Wishes,

Alex Zhang