Excel add-in security

You use the Excel Trust Center to control the behavior of add-ins. To prevent unauthorized software from acting on your Microsoft Excel worksheets, AVEVA recommends that you require add-ins to be signed by trusted publishers. Specifically, in the Trust Center, use the Add-ins page to do the following:

• Require application add-ins to be signed by trusted publishers.

• Disable notification for unsigned add-ins.

If you install PI DataLink outside of the standard C:\Program Files directory and you require add-ins to be signed by trusted publishers, then you must manually add the PI DataLink certificate to the store of trusted certificates. See Add PI DataLink certificate to store of trusted certificates.

For more information, see the Microsoft Office article View, manage, and install add-ins for Microsoft 365 programs.