September 2026 CU for Office Online Server is available for download

10 Comments

1. 

   Sven
   On 9. September 2026 Permalink

   Hello Stefan,

   download link above still references August download.

   Regards, Sven

   Reply
   1. 

      Stefan Goßner
      On 9. September 2026 Permalink

      Thanks Sven!
      It is now fixed.

      Reply
      1. 

         Alex
         On 9. September 2026 Permalink

         The download link on the email/newsletter you sent has the same issue.

         Reply
2. 

   Ben
   On 14. September 2026 Permalink

   it seems like the known issue of pasting in office 2024/21/19 etc is also happening in officeonlineserver but there isnt mentioned in the release notes https://support.microsoft.com/en-us/servicing/office/hotfix/5002910

   office 2016 release notes
   https://support.microsoft.com/en-us/servicing/office/hotfix/excel/5002914

   Known issues in this update
   In Microsoft Excel 2024, 2021, 2019, and 2016, the paste operation might fail silently. Although users try to paste content, the source remains selected and the destination is unmodified. When this issue occurs, users receive no indication of the failure, such as a beep or error message. Microsoft is researching the issue and will post more information in this article when the information becomes available.

   Reply
   1. 

      Richard
      On 17. September 2026 Permalink

      Hi Ben/Stefan,

      We experience the same behaviour in our OOS farm’s. I have opened a support ticket for this issue

      Reply
   2. 

      Ben (another Ben, not the OP)
      On 17. September 2026 Permalink

      Same behaviour here. But additionally, the FillRange function is also broken. Trying to pull down formulas or simple values fails with the message “Ihre Anforderung konnte leider nicht verarbeitet werden.
      Bitte wiederholen Sie diesen Vorgang in einigen Minuten.”. In englisch this might be “Unfortunately, your request could not be processed. Please try again in a few minutes..”

      This is not yet listed in the known issues section in the KB article https://support.microsoft.com/en-us/servicing/office/hotfix/5002910 @Stefan Gossner

      Reply
      1. 

         Patrick M.
         On 22. September 2026 Permalink

         Same behaviour here too in our OOS server. Copy/paste failure :

         Excel Online
         Désolé… Nous avons rencontré un problème lors de l’exécution de votre demande.
         Merci de réessayer dans quelques minutes.

         Reply
      2. 

         Johan
         On 23. September 2026 Permalink

         There’s an update now https://support.microsoft.com/en-us/servicing/office/hotfix/5002910

         Known issues in this update
         In Excel Online, the paste operation might fail silently. Although users try to paste content, the source remains selected and the destination is unmodified. When this issue occurs, users receive no indication of the failure, such as a beep or error message.

         This issue is fixed in the September 22, 2026, update for Office Online Server (KB4461632) [https://support.microsoft.com/en-us/servicing/office/hotfix/4461632]

         Reply
         1. 

            Peter van den Berg
            On 23. September 2026 Permalink

            Thx Johan
            Couldn’t find this fix in the official Microsoft Documentation. For Stefan, please add this link [https://support.microsoft.com/en-us/servicing/office/hotfix/4461632] to your original post description.

            Reply
3. 

   Jo
   On 28. September 2026 Permalink

   The following website does not provide the required file information. Please add the file hash information. https://support.microsoft.com/en-us/servicing/office/hotfix/4461632

   Reply