Depending on the Security settings within Microsoft Outlook, the macro's will
not run, run with a warning or run without a warning. The security settings can
be found in the Tools, Macro, Security menu.

Microsoft Outlook has three different security settings.

In the High security setting Outlook will only run Signed macros from
trusted sources. The Outlook-Sync project is digitally signed, but I used a Self
signed certificate. This means it is not from a trusted source. If you want to
use this setting you have to manually install my self signed certificate, as a
trusted root certificate authority. You can read how to do this
here.
In the Medium security setting Outlook will run the Outlook-sync
program, but will always ask you, unless you install my self signed certificate,
as a trusted root certificate authority. You can read how to do this
here.
In the Low Security setting Outlook will run al macro's without
asking. Although Microsoft doesn't recommend it, it is the easiest way to get
rid of the annoying security warning.
