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Pete_____
Inspiring
September 11, 2021
Answered

Adobe reader changing itself to 64bit when we need 32bit for the preview handler in outlook.

  • September 11, 2021
  • 5 replies
  • 59327 views

Due to other software 32bit office is a necessity.
Adobe seem to think if you manually install 32bit office that means you want it to automatically change to 32bit 5 mins later.

Anybody know how to stop this since it breaks compatability with 32bit apps.

    Correct answer Pete_____

    Looks like the PDF preview at least has been fixed in the latest update.

    If you just need the pdf preview on 32bit outlook the new update will fix this even though it's 64 bit.
    If you need it for other things I'm not sure if this will hlep or not.

    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/continuous/dccontinuousoct2021.html#dccontinuousocttwentytwentyone

    "Viewer

    • 4341634: PDF preview is not visible on 32bit outlook"

    5 replies

    P
    Pete_____AuthorCorrect answer
    Inspiring
    October 14, 2021

    Looks like the PDF preview at least has been fixed in the latest update.

    If you just need the pdf preview on 32bit outlook the new update will fix this even though it's 64 bit.
    If you need it for other things I'm not sure if this will hlep or not.

    https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/continuous/dccontinuousoct2021.html#dccontinuousocttwentytwentyone

    "Viewer

    • 4341634: PDF preview is not visible on 32bit outlook"

    D
    default92fsf6q28rou
    New Participant
    October 15, 2021

    Hello, I know most of you in this thread want to prevent 64bit from happening, but is there a registry key that accelerated the 64bit update from 32bit?  We would like all our users to upgrade to 64bit but want the adobe updater service to handle it if possible?  Thanks for the info

     

    R
    ryan5E3D
    New Participant
    September 23, 2021

    Hi,

     

    We are seeing cases of adobe auto upgrading from 32 bit to 64 bit. We need to stop this as applications that hook into reader are not 64 bit.

    I have tried the Registry key "Key:  bUpdateToSingleApp  , Value = 0 , type = dword

    Location : HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Acrobat Reader\DC\FeatureLockDown" recommended on another post, this has NOT worked.

     

    Please advise how we can stop this occuring as this is a Citrix environment this is happening which causes Adobe to not launch following your forced "upgrade".

    Reader Version: 2021.007.20091.

     

    Thanks,

    Ryan

      G
      gauranja
      Participating Frequently
      October 19, 2021

      Dear user, the fixes for this issue have been applied in the latest release so that Reader will not upgrade from 32 bit to 64 bit machines on Sever OS machines.

      You can get the latest version of 32-bit Reader from:
      https://get.adobe.com/reader/otherversions/

      A
      Ash Powell Photography
      Participating Frequently
      November 10, 2021

      Except thats wrong because it IS still happening!

        R
        Adobe Employee
        Ravi Gour
        Adobe Employee
        September 22, 2021

        Hi,

        Apologies for the trouble and thanks to reaching to us.

        In our effort to move to 64-bit app architecture, we have started migrating users from 32-bit Reader to 64-bit versio of Reader. We would like to understand why 64-bit Reader is not working for you. Could you please provide more details regarding your workflow.

        And to revert back to 32-bit version of Reader, please uninstall 64-bit Reader, install 32-bit Reader from https://get.adobe.com/reader/otherversions/ (select 32-bit version to download from dropdown).

        Create following registry key to block automatic upgrade

        Key:  bUpdateToSingleApp  , Value = 0 , type = dword

        Location : HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Acrobat Reader\DC\FeatureLockDown

        D
        defaultj8a3j976c1yp
        New Participant
        September 22, 2021

        I am praying this FeatureLockDown key actually works for preventing the update - I've got at least 6 different customers having all sorts of problems due to Reader automatically forcing itself to upgrade every time I return it to the 32 bit version. Every other method previously published on preventing updates has failed spectacularly.

         

        There are multiple reasons your deployment last week has destroyed us:

        1) Outlook 32 bit is needed due to other 3rd party Line Of Business applications with 32 bit plugins and macros and whatnot that will not work on Outlook 64 or with mapi64.dll. However, now that you've forced 64bit Adobe Reader down our throats, Reader cannot act as the Outlook PDF previewer due to the 64/32bit mismatch, so we've gone from having a working Outlook with PDF preview to no PDF preview unless we attempt to setup a completely different PDF reader product...

         

        2) The same update seems to have some major problem with an updater error that repeatedly pops up upon closing a PDF or seemingly whenever Reader is invoked for previewing in any application where it may be integrated. I don't think this is necessarily a 64bit issue, but it's a big issue introduced in the same forced update.

         

        3) I have many reports of File Associations for .pdf disappearing and users having PDFs open in their default web browser instead after the 64bit upgrade. Can be modified manually afterwards, but this is also a problem we didn't need due to an enforced upgrade we didn't ask for and have been having major problems preventing.

         

        Sorry for being terse, but this has been an absolute nightmare for 5 business days and can't even speak to suport about it because Adobe Reader has no official support... just community support.

          D
          defaultj8a3j976c1yp
          New Participant
          September 22, 2021

          Whomever made the decision to force upgrade 32bit to 64bit rather than make it opt in by administrators and users needs to rethink their decisions in future, please. This reeks of cowboy.

            Meenakshi Negi
            Community Manager
            Meenakshi NegiCommunity Manager
            Community Manager
            September 21, 2021

            Hi Pete,

             

            Thank you for reaching out and sorry for the trouble.

             

            Please download the 32 bit installer for Reader DC from this following link: https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html

            Then try to install the application. 

             

            If the issue persists, please share the exact workflow and te video of the issue occuring at your end.

             

            Let us know if that helps.

             

            Thanks,

            Meenakshi

            D
            dipit15D5
            New Participant
            September 21, 2021

            Hi 

             

            We are having the same issue - can you advise which version needs to be downloaded from the link above.

             

            is it the DC base that needs to be downloaded and installed for the 32-bit version 

            D
            DrBob
            Participating Frequently
            September 11, 2021

            How can I make 32 bit reader update to ONLY 32 bit, not 64 bit?

             

            My version of Office 365 is 32 bit, not 64 bit so I need the 32 bit version of Reader.

             

            BUT, it keeps updating to the 64 bit version.

             

            How can I stop this behaviour?

             

            This is not unique to me.

             

            Thanks.

             

              radzmar
              radzmar
              Adobe Expert
              September 12, 2021

              What's the problem with 64 Bit? What has your Office 365 to to with Acrobat Reader?

              Hall Computer5FB0
              Hall Computer5FB0
              Participating Frequently
              October 2, 2021

               

              If you are facing outlook pdf preview issue. Followings are the registry entried which needs to created:

              [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}]
              "DisplayName"="@C:\\Program Files\\Adobe\\Acrobat DC\\Acrobat\\pdfprevhndlr.dll,-101"
              "AppID"="{6d2b5079-2f0b-48dd-ab7f-97cec514d30b}"
              @="Adobe PDF Preview Handler for Vista"
              "DisableLowILProcessIsolation"=dword:00000000

              [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}\InprocServer32]
              "ThreadingModel"="Apartment"
              @="C:\\Program Files\\Adobe\\Acrobat DC\\Acrobat\\pdfprevhndlr.dll"

              [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}\ProgID]
              @="PDFPrevHndlr.PDFPreviewHandler.1"

              [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}\TypeLib]
              @="{0F6D3808-7974-4B1A-94C2-3200767EACE8}"

              [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}\VersionIndependentProgID]
              @="PDFPrevHndlr.PDFPreviewHandler"

               

              You can alternatively download the .reg file shared below and double click on it and registry entries would be automatically created.

              https://documentcloud.adobe.com/link/track?uri=urn:aaid:scds:US:e94a84df-fa43-4b26-99bf-c1906c783c2b 

               

              Please note that running .reg files changes the system configuration, so please ensure to verify the source and content of the file before running it on your system.

              Thanks,

              Ankit 

              Adobe Acrobat software engineer


              This works.. 

              Only solution on the internet that does

               

              See attached .zip file that is renamed as .pdf. 

              Rename to .zip after download - remove the .pdf off the end unpack and run the reg as supplied above 1 click fix. restart outlook

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