Access Keys:
Skip to content (Access Key - 0)

Q: Outlook Web Access has blocked access to attachments

  • Outlook sometimes blocks access to attachments. I get the following error message:

Outlook Web Access has blocked access to attachments. Blocked attachments:,


  • Reading email through Outlook Web Access (OWA),
  • Email is on the Microsoft Exchange server


It is fairly common for viruses to try to distribute themselves through files with special names. To help protect your computer, Exchange and Outlook do not allow you to receive files of certain types (such as .exe files) as attachments. You can read more about this at:

The easiest way to receive files like this is to have the sender rename them to an extension that is not blocked, zip the files before sending or use one of the Data Storage and Collaboration Options.

IS&T Contributions

Documentation and information provided by IS&T staff members

Last Modified:

February 26, 2021

Get Help

Request help
from the Help Desk
Report a security incident
to the Security Team
exchange exchange Delete
f-owa f-owa Delete
c-owa c-owa Delete
Enter labels to add to this page:
Please wait 
Looking for a label? Just start typing.
This product/service is:
Easy to use
Difficult to use

This article is:
Adaptavist Theme Builder (4.2.3) Powered by Atlassian Confluence 3.5.13, the Enterprise Wiki