Decryption fails running iOS 14.2

Hi, I CAN'T OPEN AN EXCEL FILE PROTECTED BY A PASSWORD WITH AN IPHONE IOS 14.2. (IT NORMALLY OPENED IT UNTIL THE LAST UPDATE AND THE PASSWORD WAS CREATED WITH EXCEL INTERNAL ULTILITY)

I INSERT THE RIGHT PASSWORD AND DROPBOX REPLY "DECRYPTION FAILED (NULL).

(I TRIED ALSO WITH AN IPAD, NO WAY) WHILE IT'S POSSIBLE TO OPEN THE SAME FILE FROM MACOS 10.15.7, IT WORKS PROPERLY.

I ALSO TRIED TO CREATE A NEW PROTECTED FILE, UPLOADED ON DROPBOX, BUT AGAIN IT'S IMPOSSIBLE TO OPEN IT.

HAS ANYONE FACED THE SAME PROBLEM?

THANKS

So, can someone else try this to confirm please....  from Word or excel... save a copy of the file that won't decrypt to Dropbox....  now see if that file opens in Dropbox view.....  mine did.

Unfortunately, I created the file in Dropbox, so there's not a copy in Excel for me to open, unless I'm missing something.  If so, please let me know.

Thanks.

Thanks very much for your response. I did install excel, and I am able to open the doc by clicking "open" as you suggested and then typing in my password.  The document is very hard to read in excel, but at least I have a work-around.  I sure hope dropbox comes up with a fix, however. Thanks again!

Just so everyone knows - this isn't a dropbox issue but rather an IOS issue as it is happening on my OneDrive encrypted files too.  Just letting you know.

Try saving a copy of the file.  Save the copy in Dropbox from excel or word app.  Then go to Dropbox and try opening the copy you just saved.... it worked for me.  I then deleted the original and renamed the copy.

After iOS 14.2 I have the same error in Excel and Word password protected documents

Error only on my iPhone and iPad but my Macbook isn't an issue at all.

Apple has to fix this I guess.

Yup, just noticed the same issue today.  I ordered a couple iPhone 12's, they came with iOS 14.2 installed.  I also have an iPhone 7 that now has 14.2 installed and an iPhone 11 with iOS 13.6 installed.  I've done a few tests, as follows:

1. Took an old password protected Excel file that I have been successfully opening for months on my iPhone 7 when it was running iOS 13.x.  Using my iMac, I attached it to an email and emailed it myself.  I then opened it on my iPhone 12 running 14.2 and it asked for my password like normal but after entering it and tapping Go, I got the blank white screen with Decryption Failed (null).

2. I then sent that same file to my iPhone 11 running 13.6 and it opened just fine, just like always

3. I then sent both phones (11 & 12) an unencrypted Excel file and it opened just fine on both

4. I then Opened Microsoft Office Updater on my iMac and updated to their latest level, hoping that would work but no, it didn't make any difference at all.

5. I then called Apple and was told its a compatibility issue that Microsoft owns.  Yes I suppose it could be that Microsoft has not yet combed through their software to ensure full compatibility with iOS 14.x but I sorta found that hard to swallow.  I hate calling Microsoft, they're tech support sucks.

6. I then decided to create an Adobe pdf file and password protect it.  I sent that via Mail on my iMac to my iPhone 11 & 12.  I was successfully able to open that password protected file on both the 11 running 13.6 and the 12 running 14.2.  Hmmmmm, maybe it is a Microsoft issue after all, but I don't think this is a conclusive test.

7. At that point I decided to search for the issue and came across this forum, while I use Dropbox, I don't use it for cloud type file storage but found this thread interesting to read and thought I'd post my experience today.  

8. I downloaded Microsoft Office, Excel, etc on my iPhone 12, made no difference.

I also could open a pdf encrypted file so I'm sure now it's something Microsoft has to fix.......