Exchange Server September 2025 Hotfix Updates

Andres Bohren
Exchange Server September 2025 Hotfix Updates

Hi All,

Microsoft has released the Exchange Server Security Updates yesterday for all currently supported Versions:

  • Exchange Server Subscription Edition (SE)
  • Exchange Server 2019
  • Exchange Server 2016

Exchange Team Blog Article

Issues that this hotfix update fixes:

  • ​​​​​​​Online archiving fails for on-premises users in hybrid environment using the dedicated Hybrid App

Exchange Server Subscription Edition

In my case, i’ve downloaded the Security Update for Exchange Server Subscription Edition

Installation

After the Download i started the *.exe File

Installation was successful

You have to Reboot after the Installation

Check Version

Check the Exchange Server Version

Get-Command Exsetup.exe | ForEach-Object {$_.FileVersionInfo}

Healthchecker

After Updating Exchange you should always run HealthChecker

Run HealthChecker to update Version

.\HealthChecker.ps1

Run HealthChecker and check the Warnings and Errors

.\HealthChecker.ps1

Exchange Server 2016

Download the *.exe File

Run the *.exe File

Insallation was successful

Check Version Exchange 2016

Check the Exchange Server Version

Get-Command Exsetup.exe | ForEach-Object {$_.FileVersionInfo}

Healthchecker Exchange 2016

After Updating Exchange you should always run HealthChecker

Run HealthChecker to update Version

.\HealthChecker.ps1

Run HealthChecker and check the Warnings and Errors

.\HealthChecker.ps1

Regards
Andres Bohren

Exchange Logo