A Microsoft file hosting and synchronization service.
Hello Gerson Madrid,
I can see that you are having issue with OneDrive person
Could you check whether the missing PDFs appear when you open Personal Vault from another browser, the OneDrive mobile app, or another device? This will help determine whether the files are missing from OneDrive itself or whether the Windows app is failing to display them.
If the PDFs are absent everywhere, please note the approximate time they were last visible, their filenames, and the devices that accessed the Vault during that period. You can then contact Microsoft Support and provide those details so they can check for an account or service-side issue. However, support agents cannot open or inspect the contents of your files.
Because the documents are important, also check whether copies exist in recent email attachments, browser downloads, PDF application recent-file lists, Windows File History, or any other backup service you use.
I hope another device or backup location still has a copy of the PDFs.
Feel free reply back to this post if you need further assistance, I'll be happy to help.