Now that you know how you can create a self-signed digital certificate outside PowerPoint, you will soon discover that these certificates are not trusted. This means that you can send these non-trusted certificates only to known people who are confident that the sender is the actual originator (or author) of the document. However, you can provide the recipients a certain level of confidence by converting these to trusted certificates. In this tutorial you’ll learn to stamp a self-signed certificate as trusted within PowerPoint.
Learn how to enable trusted certificates in PowerPoint 2010 for Windows.

