I had the same issue. I'm on Excel 365 and Windows 10. I was having to select "Overwrite changes" every time I saved the Excel file that was on Dropbox. I tested the same file on Microsoft OneDrive and had no problem. Then, when I went back to Dropbox the issue went away. I now assume the issue was due to a delay in syncing Dropbox.
I, too, have had this problem for at least 6 months. Win 7 64-bit, MS Office 2007, file saved on Dropbox. Moving a file out of Dropbox while working on it is no solution. Please, please fix this issue. It's damn annoying.
Same here. Windows 8.1 Pro. Microsoft 2013 (via 365 subscription). Exact same issue.
Some time in the next few weeks I'm going to upgrade to Windows 10. If the problem persists after that I'll report to Dropbox (Pro subscription so hope to get a response...)
Has anyone else upgraded to Windows 10 but still has the issue?
I have the exact same problem. I've been running Dropbox at my work computer for a few non-important files that I update frequently: notes, tasks, little stuff like that. Had Office 2007 until a few days ago when Office (and Excel) 2013 was installed.
I've covered all the usual @customer cover-my-hiney scenarios. Yes, it's the only excel.exe that's running. No, nothing new happened with my antivirus, it's the same. I tried to hide the dropbox icon. Bla bla bla.
It's volatile. Sat and typed "a" into a cell. Save. Deleted it. Saved. Did it a bunch of times. Most of the times I get the annoying dialogue, but at other times it does not appear. I bet dropbox is scanning the file, and somehow set a "someone else is viewing this" flag. For some reason Excel 2013 is more fine-grained than 2007 and then the prompt appears.
I really don't know whose issue it "really" is. But this is a fact: once I exit dropbox and it stops doing whatever it is it's doing the prompt appeared once and then never again. There's something about the scanning it does that makes Exel 2013 worried.
"nothing new happened with my antivirus" - Some A/V (like Kasperski) have been know to do stealthy updates. Disable anti-virus and test.
Dropbox only reads and never changes your files. However, many users have been confuzed by the website's "preview" files that are not the same as the original files.
I had the same problem. The reason was F-Secure antivirus software. I excluded the dropbox folder in fsec and the problem disappeared.
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