Preview .XLSX file extension with uppercase

Question

_{Tuesday, February 20, 2018 8:17 AM}

I am not able to preview .XLSX file if the extension is all in Uppercase. The preview pane works fine for all office file types including excel files. This .XLXS file type is the only exception. 

Is there any update that addresses this issue or is there any workaround? 

I have tried a few workarounds that are mentioned in this thread:  https://social.technet.microsoft.com/Forums/office/en-US/e1e41fc9-a0be-49f3-b3d8-5174cc501ee0/excel-2010-preview-handler-broken-if-file-extension-is-uppercase?forum=excel. Unfortunately, they did not help. 

I have also checked the Registry on the guid of the handler. It is {00020827 0000 0000 c000 000000000046}. 

All replies (7)

_{Tuesday, February 20, 2018 10:40 PM ✅Answered}

Hi kwa56,

Thank you for your explanation.

I could reproduce your issue in my environment (see the below). When one or more than one capital letter is in file extension (e.g. xlsX, xLSx), File Explorer doesn't show preview and says "This file can't be previews".

I suppose the issue is caused from Excel (instead of Windows), because Windows without Excel cannot show any previews for Excel documents.
I recommend to send a feedback to Excel User Voice.
https://excel.uservoice.com/

[environment for test]
  -- All Excel files are in NAS (shared folder)
  -- Windows:
      10 Pro 64-bit, Excel 2016 32-bit
      8.1 Pro 64-bit, Excel 2013 32-bit
      7 Home 64-bit, Excel 2010 32-bit

Regards,

Ashidacchi

_{Tuesday, February 20, 2018 9:48 AM}

Hi,

I'm not sure if I can understand correctly your question. So, let me confirm.
(1) the meaning of "preview":
     Does it mean Print Preview that is shown by [File] > [Print]?
(2) version and architecture:
    Please provide version (2016, 2013, etc.) and architecture (32-bit, 64-bit) number of your Excel

Regards,

Ashidacchi

_{Tuesday, February 20, 2018 5:18 PM}

Hi,

It is not from the print preview. The issue I encountered is previewing the file from Windows explore preview pane. (In File Explorer, go to View > and select Preview Pane. ) 

I have Excel 2016 MSO (16.0.8431.2110) 32 bit on my machine. 

I also see the issue on another machine with Excel 2013 (15.0.4675.1000) 64 bit. 

Thanks, 

kwa

_{Wednesday, February 21, 2018 3:19 AM}

Hi Ashidacchi San, 

Thanks for testing on your environment and redirecting, I will go to the excel channel for this issue. 

Regards,

kwa

_{Wednesday, February 21, 2018 4:43 AM}

Hi kwa56, I know that my post is not a final solution for the issue. But I will be happy, if you are satisfied with it or feel it helpful and mark on my post. Regards,

Ashidacchi

_{Wednesday, February 21, 2018 8:08 AM}

Hi, 

Just checking in to see if the information of Ashidacchi was helpful. Please let us know if you would like further assistance.

If you think the reply of Ashidacchi is helpful, I suggest you mark it as answer. Other partners who read the forums with the same issue can get more information from the correct result.

Thank you.

Regards,

Emi

Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact [email protected].

Click here to learn more. Visit the dedicated forum to share, explore and talk to experts about Microsoft Teams.

_{Wednesday, February 21, 2018 10:21 PM}

@kwa56,
    Thank you for marking. I hope Excel team will provide a solution.

@Emi Zhang,
    Thank you for indirect support.

Regards, 

Ashidacchi