3 Replies Latest reply on Aug 10, 2017 2:59 PM by charlesl68735161

    11.0.21 Update


      Unable to open some Excel attachments (xlsb, xlsm) since installing the 11.0.21 update. normal fixes - restoring trust manager settings and editing reg key dont work. is this caused by the update or is something else going on? any way to roll back?

        • 1. Re: 11.0.21 Update
          Tariq Dar Adobe Employee

          Hi Michaelb,



          Would you help us how were the files attached with a PDF file? If you install Reader DC Adobe Acrobat Reader DC Install for all versions are you able to reproduce the issue?

          Will be waiting for your response.



          -Tariq Dar

          • 2. Re: 11.0.21 Update
            michaelb14336382 Level 1

            The files are PDF Portfolios and some of the files in them are Excel files. It’s xlsm and xlsb files that started being blocked by the 11.0.21 update. we were able to re-allow access by modifying the registry key and changing those types from 3 to 2.

            • 3. Re: 11.0.21 Update

              I had the exact same issue, on two different Win7x64 machines.


              Before the update, both would open/extract Excel files attached or part of a portfolio.

              After the update (11.0.21), BOTH complained about "trust" issues.


              On one machine, it was a matter of

              1. open xls okay

              2. do the update

              3. fails to open xls


              With about 5 minute between step 1 and step 3.


              But I found a solution; it's crazy, but it works:


              On an Acrobat.exe or shortcut, select "properties", "compatibility tab", check "run in compatibility mode", and

              select "Windows 7" from the OS dropdown.


              I am *running* Windows 7, so why do I need to run in Windows 7 compatibility? That's the crazy thing.


              After the change, you get a prompt about "always open this type of file?" but you can open the excel attachments.