Attachment issue in New Outlook

Hi,

Some, but not all, PDF attachments cannot be opened from New Outlook. It seems to be related to the size of the PDF attachment - some of the large files cannot be opened anymore. The error message on opening is that the file is corrupted. From OWA Outlook, the attachment opens in Adobe Reader or in the browser, regardless of which one is used, so the file on the Exchange is not damaged.

This issue started happening a few days ago, during August 2025. I contacted Adobe support and they are addressing the issue to the Microsoft.
How do I fix the issue without reverting to classic Outlook or opening attachments from OWS Outlook? Also, downloading the attachment to my computer is not an option as it does not solve anything - the attachment file is still corrupt and this makes the workflow unnecessarily complicated.

Mirko