Checking this box will enable macros for all other workbooks signed by the publisher without displaying the Security Warning window. Excel's default security level is set to ' High' For a more thorough understanding of macro security in Excel, we recommend reading the following topic on the Microsoft Office website: users of Event 1 Office Connector find that the following steps meet their Excel macro security needs: Resolution This article is not intended to provide complete information on the topic of Excel macro security or to provide a definitive answer for your specific security needs. This may disable certain functionality of the workbook. BackgroundWhen opening an Excel workbook or creating a new workbook from a template, macros may be disabled depending on your macro security settings in Excel.