Exchange 2019 CU8 Upgrade failed - insufficient privileges to access \owa\auth\15.2.792

Stephen Challen 21 Reputation points
2021-03-09T00:20:56.527+00:00

We have had an unsual error when upgrading which has stalled after uninstalling and not allowing us to continue.

Error Message
Installing product E:\exchangeserver.msi failed. Fatal error during installation. Error code is 1603. Last error reported by
the MSI package is 'The installer has insufficient privileges to access this directory: C:\Program Files\Microsoft\Exchange
Server\V15\FrontEnd\HttpProxy\owa\auth\15.2.792. The installation cannot continue.

Any ideas to resolve the issue would be much 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.
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Accepted answer
  1. Robert Salasidis 131 Reputation points
    2021-03-11T03:08:40.287+00:00

    I refined the process on the last DAG member (running with Administrator privilege makes no difference)

    I changed ownership of owa and ecp above to administrator

    I added added Full Control to the administrator in owa and ecp.

    'Everyone' does not exist when doing this before running the CU8

    Worked perfectly, exchange comes up live after running the unattended setup above (approximately 20+ minutes runtime)

    2 people found this answer helpful.

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  1. Robert Salasidis 131 Reputation points
    2021-03-12T14:47:36.257+00:00

    You have to Change ownership of the folder via the properties-security tab in file Explorer.

    Then add the administrator account to the permissions via the file explorer as well

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  2. Andy Keen 1 Reputation point
    2021-09-18T19:59:37.587+00:00

    Hi

    If anyone is interested I have a solution for this.

    Well, the solution is for Exchange 2019 CU10 - but the errors are exactly the same (Install fails at 20/21% and also at 85-97%

    The only reason I am not putting the answer here is I am not sure if anyone is interested and it would take me a while to type it out - however - it is a solid solution that worked for me.

    Let me know

    Regards
    Andy
    KeenITSupport.uk

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