Why can't I open attachments in the new version of Outlook?

Hello,

I also had the problem and digged in a bit deeper using sysinternals Process Monitor to see what exactly fails, when the system tries to download the file in the temporary outlook folder. There I figured out that my problem was a somehow missing Attachments folder!

Please press WIN-R and type %userprofile%\appdata\local\microsoft\olk and press Enter.
Then an explorer windows opens. Check if you can see an Attachments folder. If not create one and problem might be solved for you.

Unfortunateley this fix no longer works as of January 21st, 2025.

The "Attachments" folder already exists. I can delete it and Outlook will recreate it, along with an empty sub-folder with a long object ID of sorts for each attachment I try to open. But the error "Error occurred while opening the file. Please try again." happens with every attachment.

I also attempted to rename the EWebView folder in the same directory but that does not work either.

I also tried to re-Import the Sync and Account Settings from the old Outlook per one Redditors suggestion, but it did not work either.

Office has been repaired, account setup from scratch, rebooted several times, and nothing so far has fixed this issue.

This is a Microsoft bug and we need a fix now that all my users are experiencing this problem.

I've got the same issue in my company. they are from 2 different subsidiaries within.

Nothing seems to work.

Lets see if Microsoft actually will acknowledge the issue and fix it

Have users reporting this as well. New outlook is an absolute mess and if microsoft tries to force this on companies it is going to severely impact operations for alot of companies around the world.

Just one of the many issues we are seeing that dont exist in old outlook.

Already had an attachment folder, I tried a Online repair, and then I renamed the EBWebview to .old and it worked.

Thank you, this helped me.