K Ken Slovak - [MVP - Outlook] Mar 30, 2009 #2 An addin is code you write, so you can do anything that Outlook allows from its object model or from other API's. Customize just lets you customize what's there already.
An addin is code you write, so you can do anything that Outlook allows from its object model or from other API's. Customize just lets you customize what's there already.
