Outlook For Mac Attachments Warning

Disable outlook attachment warning

OutlookMacOutlook attachment security warning
Joined
Aug 8, 2005
Messages
17
I am getting a popup when I try to open up a file directly from an email with the title being 'Attachment Security Warning'. And it goes on to say:
'WARNING! - This file my contain a virus that can be harmful to your computer. You must save this file to disk before it can be opened. It is imoprtant to be VERY certain that this file is safe before you open it.' Then the only option I have is to save it to disk. It's kind of annoying when you want to just double-click and open a document but you're required to save it to disk first.
It only does this with Office documents (.doc[x], .xls[x], .ppt, etc.). I no problems opening .pdfs, pictures, etc. Only office documents.
I've done some research and know about Level 1 attachments and Level 2 attachments. And I've flat out found out that this particular warning is displayed because it is in those extensions are in the Level 2 list, or it has something to do with Level 2 in Outlook.
But how do you get to these Level 2 attachment extensions and remove them so I can just open the documents directly? Is it a registry edit somewhere?
Not all computers here are having this problem. Only a few. They are all up-to-date with updates, all have the same updates, all running Office 2007. Any ideas?
Thanks.

Outlook Attachment Security Warning

Outlook won’t let you specifically test for a file attachment name, but you can check the message header. The message header should have the names of file attachments. Unfortunately, the message header has other information like the Subject line so any test on the header may pickup unwanted ‘false positives’. You use Microsoft Outlook 2016 for Mac or Outlook for Mac 2011 to connect to a mailbox on a Microsoft Exchange server. When you send an email message that contains a large attachment, you receive the following error messages in Outlook for Mac.