Exchange server 2019 CU15 setup command question with best practice

Question

Dear Sir,

 Customer has Exchange 2019 server running, they want to install CU15. Do it has any suggestion whether it is fine using below command?
```E:\Setup.exe /IAcceptExchangeServerLicenseTerms_DiagnosticDataOFF /Mode:Upgrade /DonotEnableEP

Do it have any issues if the command is not included /DonotEnableEP parameter?

If it is not requirement, customer is asking that when will they include this /DonotEnableEP during CU15 upgrade?

Any reference of article  and the best practice to install exchange CU?

Regards,

Joe Tam

Answer 1

Hi @JOE TAM,

Welcome to Q&A!

The /DoNotEnableEP parameter is associated with the Windows Extended Protection (EP) feature. For detailed information, refer to: Exchange Server support for Windows Extended Protection | Microsoft Learn.

If your servers are not yet prepared for EP, please use the parameter to opt out of EP on servers that do not meet the prerequisites. Failure to do so may result in broken functionality after installing the Cumulative Update (CU).

The prerequisites for enabling EP on Exchange Server include:

• Exchange Server Health Checker script or the new PrerequisitesCheckOnly parameter in our ExchangeExtendedProtectionManagement.ps1 script.
• Prerequisites for enabling Extended Protection on Exchange server

The best practice is to enable the EP during the installation. So, if your organization meet the prerequisites above, please do not use the /DoNotEnableEP parameter.

For further details, please read this document: Released: 2024 H1 Cumulative Update for Exchange Server | Microsoft Community Hub.

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