Exchange 2019 CUs fail - qfe patch is not applicable

27772953 26 Reputation points

I have come across an Exchange 2019 who is still at CU5. I am trying to get it to the current CU (that is 11) but am unable to even apply CU6.

  • Windows Server 2019 is at 1809 and fully updated (that is, no more updates are being reported by the Windows Update function)
  • .Net Framework is at 4.8.03761
  • Exchange is at 2019 CU5 (15.2.595.3)
  • Patch to be installed is CU6 (15.2.659.12)
  • (filename).msp is permitted to run at the 'unrestricted' authorization level
  • Installation success or error status: 1642

Log file excerpt with error

MSI (s) (8C:DC) [15:40:27:808]: SequencePatches starts. Product code: {CD981244-E9B8-405A-9026-6AEB9DCEF1F1}, Product version: 15.2.595.3, Upgrade code: {A4A259AB-A77F-4039-832A-27B431DDFFEA}, Product language 1033 MSI (s) (8C:DC) [15:40:27:811]: PATCH SEQUENCER: verifying the applicability of QFE patch C:\Users\Administrator\Downloads\Exchange CUs\CU06-2021-03-Exchange2019-KB5000871-x64-en.msp against product code: {CD981244-E9B8-405A-9026-6AEB9DCEF1F1}, product version: 15.2.595.3, product language 1033 and upgrade code: {A4A259AB-A77F-4039-832A-27B431DDFFEA} MSI (s) (8C:DC) [15:40:27:811]: PATCH SEQUENCER: QFE patch C:\Users\Administrator\Downloads\Exchange CUs\CU06-2021-03-Exchange2019-KB5000871-x64-en.msp is not applicable.

Any help will be greatly appreciated

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
7,208 questions
0 comments No comments
{count} votes

Accepted answer
  1. Andy David - MVP 138K Reputation points MVP

    Ok, go straight to CU11, you dont need to go to CU6 first.

    Then apply the November 2021 security update

    Follow these steps, rebooting after EACH step and running from an ELEVATED PROMPT.

    Run each step separately:
    Setup.exe /IAcceptExchangeServerLicenseTerms_DiagnosticDataON /PrepareSchema
    Setup.exe /IAcceptExchangeServerLicenseTerms_DiagnosticDataON /PrepareAD
    Setup.exe /IAcceptExchangeServerLicenseTerms_DiagnosticDataON /PrepareAllDomains

    Then install CU11:

    Then install the security patch:

    Critical Patch:

    1 person found this answer helpful.

1 additional answer

Sort by: Most helpful
  1. KyleXu-MSFT 26,196 Reputation points


    For Exchange 2019 CU 11, you also need to install the IIS URL Rewrite Module before installing Exchange server.

    1 person found this answer helpful.