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.