Exchange 2013 CU9- Need to upgrade to CU23.

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  Hi - I'm at CU9 in a DAG environment at the moment and need to upgrade to the latest. Can I go directly to CU23?

  Also I read that any custom xml's would need to be backed up. How would I know which xml's were changed?

  Anything else I would have to watch out for?

  Thank you for your help!!!

  Joe

   

  Yes, you can:

  As far as any xml/ web config customization, the expectation is that you documented that if any were done :) 

  https://docs.microsoft.com/en-us/exchange/plan-and-deploy/supportability-matrix?view=exchserver-2019

  If you are upgrading Exchange Server from an unsupported CU to the current CU and no intermediate CUs are available, you should first upgrade to the latest version of .NET that's supported by your version of Exchange Server and then immediately upgrade to the current CU. This method doesn't replace the need to keep your Exchange servers up to date and on the latest supported CU. Microsoft makes no claim that an upgrade failure will not occur using this method, which may result in the need to contact Microsoft Support Services.

  
  

  • Edited by Andy DavidMVP Thursday, April 23, 2020 3:10 PM

  Thursday, April 23, 2020 3:10 PM
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  Andy - Thanks for the quick reply. I don't have any notes for the changes in the XML's because a 3rd party did the config. Do you what would be the most common xml's what would be changed in a basic EX13 setup?

  Thanks

  Thursday, April 23, 2020 5:37 PM
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  Andy - Thanks for the quick reply. I don't have any notes for the changes in the XML's because a 3rd party did the config. Do you what would be the most common xml's what would be changed in a basic EX13 setup?

  Thanks

  Probably none actually. There are no typical ones that would be changed, but I suspect it wont be an issue for you. Honestly, I wouldnt really worry about that piece of it. Its more critical to get that thing updated to the latest CU and security patch

  https://support.microsoft.com/en-us/help/4536988/description-of-the-security-update-for-microsoft-exchange-server-2013

  • Proposed as answer by Lydia ZhouMicrosoft contingent staff Friday, April 24, 2020 3:07 AM
  • Marked as answer by Joe Few Friday, April 24, 2020 11:34 AM

  Thursday, April 23, 2020 5:48 PM
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  Thanks Andy. Will do.

  Friday, April 24, 2020 11:33 AM
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  Hi, 

  It's great that you can get useful information from reply above. If you have other issues about Exchange, please feel free to post in our forum.

  Regards,
  

  Lydia Zhou

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  Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

  Monday, April 27, 2020 1:06 AM