Fred,

I don't know the answer for certain, but just think how easy it would be for
a virus to update your list of trusted sources without your knowledge and
wreak all sorts of havoc on your spreadsheets, etc.
I would think, therefore, that the answer is No.

Henry


"Fred" wrote in message
...
We use Excel VBA macros in many of our shared workbooks (numbering in the
thousands). When users have macro security set to High, our macros do not
run because they are not signed. This is a serious problem, especially
with the users. While we have a utility to self certify our macros
(SELFCERT.EXE), it does not help unless all users have us in a list of
trusted sources. We need a way to create and maintain this list of trusted
sources. Any thoughts? Can we do this without a rootCA or purchasing
certificates from say...verisign?


Thanks!