January 2023 Exchange Server Security Updates

Hi All,

Just a few hours Ago the January 2023 Exchange Server Security Updates have been released.

Released: January 2023 Exchange Server Security Updates


In my case i have downloaded the Security Update 5 for Exchange 2016 CU23

Security Update For Exchange Server 2016 CU23 SU5 (KB5022143)
https://www.microsoft.com/en-us/download/details.aspx?id=104914


Then run the Security Update











When you run the HealthChecker and it has found an update close and reopen Exchange Management Shell after the update.

Exchange HealthChecker

.\HealthChecker.ps1


As you can see the "SerializedDataSigning" is not enabled


Let's run the MonitorExchangeAuthCertificate - basically just checks if the Certificate is still valid or needs to be renewed.

I've blogged how to do that.

Renew Microsoft Exchange Server Auth certificate


.\MonitorExchangeAuthCertificate.ps1


In that case i can Enable the SigningVerification


Organizational-wide:

New-SettingOverride -Name "EnableSigningVerification" -Component Data -Section EnableSerializationDataSigning -Parameters @("Enabled=true") -Reason "Enabling Signing Verification"


Get-ExchangeDiagnosticInfo -Process Microsoft.Exchange.Directory.TopologyService -Component VariantConfiguration -Argument Refresh


Let's run the HealthChecker again

.\HealthChecker.ps1



Regards
Andres Bohren