November 2025 CU for SharePoint Server 2016 is available for download

16 Comments

1. 

   Tom
   On 12. November 2025 Permalink

   Regarding the note in the blue box, would it not be more accurate to say “If your current farm patch level is September 2025 then you need to…..”
   My understanding was that if you’ve installed the October update (after installing September) then the issue is resolved and no accounts need to be removed from groups. Or do I have that wrong?

   Reply
   1. 

      Stefan Goßner
      On 12. November 2025 Permalink

      Yes – absolutely!

      Thanks Tom! Wording has been updated.

      Reply
2. 

   Martin B.P.
   On 13. November 2025 Permalink

   Hello Stefan,

   can you please confirm patching steps for 2016 farm with Classic Workflow Manager and August CU?

   Add the ServerDebugFlags 53601
   Ensure LOCAL SYSTEM account is removed from WSS_WPG & IIS_IUSRS groups.
   Install Novermber CU & run the wizards.

   And that’s all? Thank you.

   Reply
   1. 

      Stefan Goßner
      On 13. November 2025 Permalink

      Hi Martin,
      if your SharePoint farm is on August CU or older, removing local system is not required.
      If your SharePoint farm is on September CU, then it is required.
      The other steps look good.
      Cheers,
      Stefan

      Reply
3. 

   Micke
   On 13. November 2025 Permalink

   Hi Stefan!

   Instructions for installing KB5002805 says if im using Sharepoint Workflow Manager i have to install KB5002799 before SP-server patch. This was missed in my environment.

   Do you know if i have to uninstall KB5002805 and start all over, KB5002799 first and then KB5002805?

   Installing KB5002799 on top wont work?

   Regards
   /Micke

   Reply
   1. 

      Stefan Goßner
      On 13. November 2025 Permalink

      H Micke,
      KB5002799 is a SPWFM fix, not a SharePoint Server fix.
      So you can install it on the SPWFM machine before or after installing the SharePoint Server fix.
      But don’t forget to uninstall the old SPWFM client and then install the SPWFM client libraries matching the SPWFM fix from KB5002799 as well on all SPWFM and SharePoint Server machines!
      Without it will not work.
      Cheers,
      Stefan

      Reply
      1. 

         Micke
         On 13. November 2025 Permalink

         Hi Stefan!

         Thank you for your answer!

         I found why instruction was confusing me.
         Im Swedish and the instruction in swedish for KB5002805 must be wrong.

         “Om du kör SharePoint Arbetsflödeshanteraren måste du installera SharePoint-Arbetsflödeshanteraren (KB5002799) i servergruppen innan du installerar den här kumulativa uppdateringen.”

         Becomes in english:
         “If you are running Sharepoint Workflow Manager you must install SPWF(KB5002799) before you upgrade this CU(KB5002805)

         The english page has the correct instruction

         “If you’re currently running SharePoint Workflow Manager, you must install the August 2025 update for SharePoint Workflow Manager to your farm before you install this cumulative update.”

         Regards,
         /Micke

         Reply
4. 

   Abdullah
   On 16. November 2025 Permalink

   after install and update november CU we faced error
   500 – Internal server error.
   There is a problem with the resource you are looking for, and it cannot be displayed.

   Reply
   1. 

      Stefan Goßner
      On 17. November 2025 Permalink

      Hi Abdullah,

      please check if you are running into this issue:
      https://blog.stefan-gossner.com/2023/10/17/trending-issue-module-sprequestfiltermodule-could-not-be-found-after-september-october-2023-cu/

      Cheers,
      Stefan

      Reply
5. 

   Aditya
   On 18. November 2025 Permalink

   HI Stefan,
   We are currently using classic workflow manager with our SP 2016 farm.
   During the October patch update, we already added below and completed the patching successfully :
   ServerDebugFlags 53601

   Now for November patch, there is no need to run the below script again, we can simply go ahead with binaries installation and PSConfig using an account which is NOT a member of WSS_WPG:
   $farm = Get-SPFarm
   $farm.ServerDebugFlags.Add(53601)
   $farm.update()
   iisreset

   Reply
   1. 

      Stefan Goßner
      On 18. November 2025 Permalink

      Hi Aditya,
      yes, there is no need to set the ServerDebugFlag again.
      Cheers,
      Stefan

      Reply
6. 

   Pam
   On 24. November 2025 Permalink

   Stefan,
   Our Last CU is July 2025, do we need to proceed following instructions as if it was September 2025 CU?

   Reply
   1. 

      Stefan Goßner
      On 24. November 2025 Permalink

      Hi Pam,
      no – there are no special steps required if you skip September 2025 CU.
      Cheers,
      Stefan

      Reply
      1. 

         Freddy
         On 1. December 2025 Permalink

         I guess its no difference to go from August CU to November CU, but I better ask, can it be installed as “usual” as well ?
         AMSI is not enable, how will that affect the farm when “Machine Key Rotation using the new automatic SharePoint timer job” is implemented? Should it just work out of the box, or can it be disabled if necessary?

         Reply
         1. 

            Stefan Goßner
            On 2. December 2025 Permalink

            Hi Freddy,
            you can directly go from August to November CU.
            AMSI will be permanently enabled after the upgrade and cannot be disabled. So my recommendation is that you check your configuration against the following article before applying the patch to ensure that the relevant module is correctly configured to prevent a downtime:
            https://blog.stefan-gossner.com/2023/10/17/trending-issue-module-sprequestfiltermodule-could-not-be-found-after-september-october-2023-cu/
            The machine key rotation job will be available after the upgrade and will be configured to run once a week on Sunday.
            It should work automatically but – yes, the job can be disabled if required.
            Cheers,
            Stefan

            Reply
            1. 

               Fred
               On 2. December 2025 Permalink

               Hi Stefan,

               Thank you very much for taking your time and answering so quickly. Installation seems to have gone well.

               Best regards
               Fred