Work-around for blocking of invalid certificates Excel 2007


J

JBeckett

I have received a workbook with macros in it. I trust the sender and the
workbook is signed with a digital signature. However, I receive a security
alert informing me that the macros have been disabled because the signature
is invalid and cannot be trusted because the issue of the certificate cannot
be found. Despite installing the certificate and adding the document to my
trusted folders, I cannot run the macros in this workbook.

Any inpout would be greatly appreciated.
 
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O

Office_Novice

Check you Macro security setting Tools > Macro > Security

Try setting them to a lesser level.
 
J

JBeckett

That is of course obvious but it degrades my security significatly when I
only want to be able to get this single workbook to work. I want to be able
to selectively override the mechanism that is blocking the use of an invalid
digital certificate.
 
J

Jon Peltier

Do the macros work despite the certificate mess when the security level is
set to medium? You have to approve macros at this level, whereas at high,
you generally will not be asked to approve macros.

- Jon
 
J

JBeckett

Hi Jon,

Thanks for the reply. The only way I get this to work is by setting the
Macro Setting of "Enable all macros". I am prevented from approving this
macro with the setting "Disable all macros except digitall signed macros"
enabled. I realize ultimately the problem exists with the certificate but I
could more easily part the Red Sea then get this vendor to correct their
certificate so I was hoping there would be a work around for the blocking of
workbooks with invalid certificates.

-Jason
 
J

Jim Rech

If you open this file with or without macros enabled and then save it,
doesn't this remove the certificate? And if it does, can you then go back
to medium security for all files? A one time hassle every time you get a
new file but...

--
Jim
| Hi Jon,
|
| Thanks for the reply. The only way I get this to work is by setting the
| Macro Setting of "Enable all macros". I am prevented from approving this
| macro with the setting "Disable all macros except digitall signed macros"
| enabled. I realize ultimately the problem exists with the certificate but
I
| could more easily part the Red Sea then get this vendor to correct their
| certificate so I was hoping there would be a work around for the blocking
of
| workbooks with invalid certificates.
|
| -Jason
|
| "Jon Peltier" wrote:
|
| > Do the macros work despite the certificate mess when the security level
is
| > set to medium? You have to approve macros at this level, whereas at
high,
| > you generally will not be asked to approve macros.
| >
| > - Jon
| > -------
| > Jon Peltier, Microsoft Excel MVP
| > Tutorials and Custom Solutions
| > Peltier Technical Services, Inc. - http://PeltierTech.com
| > _______
| >
| >
| > | > > That is of course obvious but it degrades my security significatly
when I
| > > only want to be able to get this single workbook to work. I want to be
| > > able
| > > to selectively override the mechanism that is blocking the use of an
| > > invalid
| > > digital certificate.
| > >
| > > "Office_Novice" wrote:
| > >
| > >>
| > >> Check you Macro security setting Tools > Macro > Security
| > >>
| > >> Try setting them to a lesser level.
| > >>
| > >> "JBeckett" wrote:
| > >>
| > >> > I have received a workbook with macros in it. I trust the sender
and
| > >> > the
| > >> > workbook is signed with a digital signature. However, I receive a
| > >> > security
| > >> > alert informing me that the macros have been disabled because the
| > >> > signature
| > >> > is invalid and cannot be trusted because the issue of the
certificate
| > >> > cannot
| > >> > be found. Despite installing the certificate and adding the
document to
| > >> > my
| > >> > trusted folders, I cannot run the macros in this workbook.
| > >> >
| > >> > Any inpout would be greatly appreciated.
| >
| >
| >
 
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J

Jon Peltier

Isn't there an in-between setting? (I have no practical experience with
certificates.)

- Jon
 

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