A plethora of tutorials to get you up to speed with Microsoft Word 2013
If you read our tutorial on enabling content in Word, you might be wondering what precisely active content is. Active content is additional functionality in a document, such as that provided by macros, add-ins, or data connections. Because of its risky nature, the active content in a document causes a warning to be issued when you open it. After seeing this warning you can then decide to either enable the content or play it safe and leave it disabled. Much of your decision depends on how much you trust the document’s source.
This tutorial list all the active content types that will trigger this security warning.
When the following kinds of active content are detected by the Trust Centre in your document, the Message Bar appears and issues a warning:
The following kinds of external content are linked externally to the file or embedded within it. Therefore, they’re also blocked: