Problems with icon thumbnails in dropbox

[ferreirahomeoffice]

Hello, greetings to everyone on the forum,
I'm encountering a very annoying problem, which I don't know if it has direct links with Iventor, but the fact is that the thumbnails of the .iam, .ipt and .idw files are not displayed when their directory is inside Dropbox, however when files are outside they are displayed normally, I've already checked and the files are not allocated in the cloud, by the green verified icon on each file in Dropbox it appears that it is offline, and even so it is not displayed, what could this be guys?

[johnsonshiue]

Hi! This could be a Dropbox specific issue. Please take a look at the following article to see if some of the change may help your case.

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/File-thumbnails-do...

Many thanks!

[claudio.gardosi]

Hi everyone, I’m having the exact same issue with thumbnails for .iam, .ipt, and .idw files not showing inside Dropbox folders, even though the files are marked as “Available offline.” When I move the files outside Dropbox, the thumbnails appear just fine.

It definitely seems related to how Dropbox handles synced files. Has anyone found a reliable fix or workaround for this yet?

Thanks in advance!

[OlleBlink]

I also got the missing thumbnail problem after updating Inventor from 2025 to 2026.

I did reinstall Dropbox as proposed in this thread https://forums.autodesk.com/t5/inventor-forum/thumbnails-missing-in-file-explorer-and-all-explorer-w... but still missing thumbnails.  I did not delete files from my computer Dropbox folder, only reinstalled Dbox.

I was able to fix the problem partly by copy files from Dropbox folder (off-line files) to a folder I created on desktop.  Thumbnails and preview showed up in this folder.

After this I moved files back to Dropbox folder replacing files.  After this thumbnails  and preview is working.

!! This fixed the problem in windows explorer, but it did not fix the problem in Inventor Open or Save as - explorer !!

//Olle

[Desam]

I think this has been caused by the last dropbox app update and is not resolvable without an update to the dropbox app - perhaps autodesk can assist them to include native inventor file thumbnail handling for online only files also?