Random files suddenly locked by themselves when using Excel.

[asabry]

I have a domain environment devices with dropbox on them, we are collaborating on excel sheets using online excel.
We have only the basic free plan of Dropbox
So as i know the feature of locking files for editing is not available.
But suddenly this error started to show however we all have editing permission. And offline side of Dropbox the locked files now have a lock sign on the excel icon's side.

The online error says :

"Someone else is editing this workbook. You will be able to make edits after they have closed the workbook "

Have anyone faced this before?
Thanks

[Megan]

Hey @asabry, thanks for posting here today!

It sounds like this error is coming directly from Microsoft, but let's see what we can find together. 

Are you referring to shared content? Do you all use individual accounts, or the same Dropbox account? 

If I were you, I'd try editing the content using a different browser too, just to check the behavior there. Feel free to also have a look here.

I'll be waiting your