In some environments, Microsoft's Trust Center will not allow you to automatically add Event 1 Software, Inc. as a trusted publisher using the instructions listed here.
If this occurs in your environment, the instructions listed below should help you resolve the matter.
Excel 2010 & above
- Do not click the Enable Content button. Instead, click on the sentence to the left of it that reads "Some active content has been disabled. Click for more details" (show me)
- Click the Enable Content drop-down button and click Advanced Options (show me)
- In the Security Alerts dialog box, choose Trust All Documents From This Publisher for each record listed as Event 1 Software, Inc.
- Close and re-open Excel.