I'm having an issue with a spreadsheet we've created in Excel 2007. The
spreadsheet is configured to grab some data from a SQL server on our LAN.
The problem is, you're hit with a security dialog that states "Security
Warning: Data Connections have been disabled." When I add the location of
the file to my Trusted Locations, the dialog goes away.

Here's what we would like to do. We'd like to be able to sign the document
with a certificate and set all of our client PCs to trust this certificate
via GPO. The idea here is that any user can open a signed document from
anywhere, whether it be off Sharepoint, a network share, a local copy, or
whatever, and have the document automagically work without having to answer
any dialog prompts. Idiot-proof active content, in other words. =)

I've tried signing a test spreadsheet with a certificate and adding the same
certificate to my Trusted Publishers container, but I'm still hit with a
security warning when opening the file. Does anyone know of a way to take
care of this?

On a side note, I know you can resolve this by setting up Excel Services,
but we don't want to have to worry about where our users are opening
spreadsheets from. Any insight is appreciated. Thanks!