Cannot open password protected PDF in MacOS 12 Monterey

[ACCAS-JF]

Dear community,

my customer has recently received a new MacBook with macOS 12. He is currently having the problem of receiving password protected PDFs from another company. When he opens the PDF in Adobe and enters the password, Adobe says the password is incorrect. However, when he opens it in Apple's Preview app and enters the password, he can read the contents. (Yes, we copied and pasted the password to make sure there was no typo).

(translated, so the format is strange)

Wenn er nun eine andere Person fragt, die nicht MacOS 12, sondern eine frühere Version von MacOS (z. B. OS 10.11) hat, kann er die Datei ganz normal im Adobe Reader öffnen.

Wir haben festgestellt, dass in der Vorschau-App von MacOS 12 kein Passwort für das Lesen festgelegt ist, sondern nur ein Besitzer-Passwort.

If we set a new password required to read, we still can't open the PDF in Adobe Reader. However, if we set a new owner password and a new password required to read, we can open the PDF.

Is there something I'm missing so that Adobe skips the required to read password and goes straight to the owner password, or can it only be opened with the password at the beginning (password required to read)

[S. S]

Hello,

I hope you are doing well. I am sorry for your experience with Acrobat Reader.

Is this issue with specific files or with all files that are password protected?

If the issue is with all password-protected files, please share a sample file with us so that we can check it at our end and respond better. 

Hoping to hear more from you.

Thanks,

Souvik.

[ACCAS-JF]

Dear Souvik,

thank you very much for your reply, I am fine, I hope you are fine.

So far we have encountered the problem that when trying to open encrypted files from an older macOS system, we could not read them despite entering the correct password. However, if you repeat the steps I wrote above, you were able to make the files readable.

Unfortunately, I don't have a file available at this time, but I will try to get one that we can upload.

[S. S]

Thanks for your response. I tried creating a file and then password-protecting it in the first method that you suggested above. It worked fine on my end.

It could also be how the PDF was created, which could cause the issue. Could you also share a screenshot of the description window of the document you are working with?