I'm having an issue with outlook when i drag and drop attachments into a folder. The problems appear for a day or 2 then goes away. It's happening with multiple users on multiple computers all running Windows 10, but with different versions of Outlook. We're hosting our own Exchange 2013 instance on-premise.
If they receive an email with an attachment, PDF, TXT, JPG doesn't matter. We can view that attachment without any problem inside outlook.
We can drag/drop and download this attachment to local disk, it can open fine from the local drive.
Now if we drag/drop the same file back into any folder or subfolder in outlook it immediately becomes corrupt, i can't preview it in outlook and i can't re-download it again. It becomes a corrupt object in the outlook folder. I can delete it without any issue.
Tried the following so far with no resolution
- Rebooted Server
- moved affected user/mailbox to a new EDB on server
- removed/reinstall outlook on desktop
- updated outlook to the latest version
- installed an older outlook 2013 version
- the folder in outlook does not matter
- disabled all AV software
Any other suggestions ?