Hi,
There could have been some settings that have changed, hence, the issue. Allow us to verify a few details so we can properly isolate the concern.
- How are you accessing your emails? Is it via a web browser or through the Outlook app?
- Have you tried downloading files from your email before? Did you ever get the same error?
- Have you recently done an update or received any on your computer?
- What device are you using to do the downloading?If it's a PC, what is its current OS build and version?
We will wait for your reply.
Regards.