Exchange 2013 to Exchange 2016

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  Hi, i have inhereted an enviroment that has exchange 2013 CU2 and we want to move to CU22 so we migrate to 2016. Is it ok to upgrade straight to CU22? Any advice on the best course of action? Thanks.

  Go straight to CU23. you will also need to upgrade the schema

  https://docs.microsoft.com/en-us/exchange/prepare-active-directory-and-domains-exchange-2013-help

  See:

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

  When upgrading Exchange 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 Exchange 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.

  • Proposed as answer by adammiltonBanned Thursday, July 18, 2019 5:37 AM
  • Marked as answer by Raygunz Friday, July 19, 2019 10:16 AM

  Thursday, July 18, 2019 1:30 AM
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  Hi Raygunz,

  Exchange 2013 CU 10 or later could coexist with Exchange 2016, so you can update it to any version of Exchange 2013 which higher than CU 10:

  

  About update of Exchange 2013, you should update the change of .net:

  

  So, you can take steps below to update it:

  1. Install .net 4.7.2/4.8

  2. Install VC++ 2013 runtime which needed from Exchange 2013 CU 21.

  3. Update Exchange from CU 2 to CU 23

  4. Install Exchange 2016 coexist with Exchange 2013 and migrate mailbox from Exchange 2013 to Exchange 2016.

  Regards,
  

  Kyle Xu

  ---

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

  • Marked as answer by Raygunz Friday, July 19, 2019 10:16 AM

  Thursday, July 18, 2019 6:31 AM
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  One other question, is DAG maintenance mode available in Exchange 2013 CU2?

  Thursday, July 18, 2019 12:26 PM
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  One other question, is DAG maintenance mode available in Exchange 2013 CU2?

  Yes.

  Thursday, July 18, 2019 12:31 PM
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  Thanks everyone

  Friday, July 19, 2019 10:17 AM