MacOS15 / Sequoia - problems with Microsoft files

This fixed a bit the quicklook preview problem for docx documents for me, but only on files saved on the desktop and not in other folders and it only works until you restart (Curious!): Pages no longer opens Word (.docx) docume… - Apple Community

Same issue with me (from France).

After updating to Sequoia:

• documents with extension .docx and .xlsx were not recognized (.pptx, and previous office extensions like .doc with the "x" were well recognized).
• After damaging a word file because it was opening with iBooks Author by default (I didn't paid attention at that time) then I forced opening of docx and xlsx documents by going to the "information" of one of each type of file and then asked to use these apps for all.
• Since then I have been able to open docx and xlsx files, but stil the icon is is blank in the finder and the "Preview" mode is not working for these files.
• Pages cannot open the docx files (Numbers cannot for the xlsx files)
• When I open Word, the recent and the file browsing well recognizes the docx files and displays the icons. Same in DropBox, Open Office, LibreOffice or other Apps, but still not in Finder.
• When I create a new docx documents, the icon is also not displaying in the Finder and the Preview doesn't work either.

I use the latest versions of Sequoia and of Office business/Family 365 on a MacBook Pro 16" 2023 M2 Max.

(I reinstalled both Sequoia and Office without any improvement)

> In my case, I updated to macOS 15.0 and the 3 Microsoft Office apps disappeared from the Applications folder.

...

• TActually, they disappeared on my MacBookPro M1 but they did not disappear on my iMac (Intel processor) although both are now on MacOS 15.0.
• I went to the Microsoft 365 subscription page using my MacBook Pro, downloaded and installed the apps.
• The problem is solved

I don't see Files & folders here‽

I've got the same type of issue. In my case the word file extension is connected to Canva. If I try to reassign it to Word it says ok and tries to open the file in word but it ends up with the damaged file message. That's even for a file I created in word 30 seconds ago. The same goes for Microsoft Excel files. Same type of message and they're also connected to Canva.

Microsoft Powerpoint made it through for some odd reason.

Running: MacBook Pro M1

MacOS: Sequoia 15.0 Swedish

I sort of figured it out but it seems some what backwards to me. To see the icon for the file that you saved it as you have to use "Show View Options" and uncheck "Show icon preview" and the icon for the app will appear for the file. I would have thought that checking it would reveal the icon for the file.

See if there are in /Users/YourName/Library/Mobile Documents/com~apple~CloudDocs

Have you tried both save as a pdf and print to pdf?

They still seem to work for me.

Hold the Option key down

If it's Sequoia, why do I have no problems with Wallpaper... I have no MS Apps since Office '95.

Me too. PPTX, Word, Excel, Numbers & Preview all crash on EXPORT or SAVE AS.

I have same for Excel and Word

Others work fine

Tutti i miei file .docx hanno l'icona di Adobe Illustrator e risultano "danneggiati e da spostare nel cestino"

Deleting the Whereby-App on my iPhone did the trick! xlsx and docx are now visible in Quick Look again. Unbelievable… Thanks for this hint/link.

There was an update from Microsoft Office365 this morning. But alas, the issues persist. Not sure if this is a Microsoft issue or an Apple issue...