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Excel 2007 workbooks in a digital signature workflow

  Asked By: Norma    Date: Sep 08    Category: MOSS    Views: 1323

We have Excel 2007 workbooks that we regularly route through a workflow via MOSS
for digital signatures, and this process used to work flawlessly. But now,
anytime someone adds his or her digital signature to the workbook being routed,
the next person on the workflow's distribution list always gets a message that
says, "Signatures cannot be added or removed because this read-only workbook has
been changed." But I've observed that whenever this happens, nobody is making
ANY revisions to those workbooks!

The only thing we've done differently is that we added some macros to this
workbook that includes some custom functions. Of course, that changed the file
extension from .xlsx to .xlsm. Is that what's invalidating the electronic
signatures?

This error message also says, "Remove signatures, enable editing, save your
changes, and try again," but nothing in Excel 2007's online help tells you HOW
to re-enable editing on a workbook that's already been signed.

So basically my two questions are:

1. Can you route an Excel workbook through a digital signature workflow when it
has macros that include custom functions? Are those functions "revising" the
workbook after it's been signed?

2. How do you re-enable an Excel 2007 workbook for editing after its first
signature?

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