Exchange CU Update

MSAzure101 121 Reputation points
2021-04-01T18:33:17.85+00:00

Hi

Updating an Exchange Server (its non internet facing hence doing it now)

Exchange 2013 CU6 (hadnt been done since 2014)

Its a mailbox only server in a hybrid 365 environment, there is no DAG etc

Do i still need to put Exchange server into maintence mode or can I just update .Net Framework 4.7.2 and install CU23?

Thanks, links appreciated with answers as well :)

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.
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  1. Andy David - MVP 142.3K Reputation points MVP
    2021-04-01T18:39:24.597+00:00

    No need for maintenance mode.

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

    https://learn.microsoft.com/en-us/exchange/plan-and-deploy/prepare-ad-and-domains?view=exchserver-2013

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

    Install .net 4.8
    https://learn.microsoft.com/en-us/exchange/plan-and-deploy/supportability-matrix?view=exchserver-2019#microsoft-net-framework

    Then install CU23:

    https://www.microsoft.com/en-us/download/details.aspx?id=58392

    Then install the security patch:

    Critical Patch:
    https://www.microsoft.com/en-us/download/details.aspx?id=102775

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  1. MSAzure101 121 Reputation points
    2021-04-01T19:48:56.51+00:00

    Thanks Andy really appreciate the quick response super stuff

    I thought that CU23 was the security patch

    https://practical365.com/microsoft-issues-critical-security-updates-for-exchange-server/

    Two more queries I got a prerequisite for 4.7.2 .Net Framework is it better to just install 4.8 as you say?

    Also I was going to run setup.exe from the CU23 once extracted

    What happens if I don't run those steps as below? (Just looking to learn more about it I have done the below for a fresh Exchange install alright) :)

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

    Also why no need for maintenance mode? Excellent stuff :)