This example shows an attachment titled "database1.accdb." If you attempt to click on the image to open/view it, you will see the following message.
When using Office365 OWA you can click on save the attachment to OneDrive and open from there.
For more information about blocked attachments in Outlook please view this Microsoft support article.
Article ID: 798
Created On: Fri, Oct 30, 2015 at 11:15 AM
Last Updated On: Mon, Jan 10, 2022 at 4:12 PM
Online URL: https://kb.mc3.edu/article/office-365-outlook-web-access-owa-unable-to-view-open-an-e-mail-attachment-798.html