You can run a macro from the outlook with the menu "Tools | Macro | Macros...", select the macro in the list.

An easier way, you can add the macro to the toolbar:
1. Select the menu "Toolbars | Customize".
2. Switch to the Commands tab.
3. Under Categories, select Macros.
4. Drag the macro to the desired toolbar.
4. Right-click on the new toolbar button, then change the Name or button appearance as desired.