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I'm trying to create a S/MIME signing certificate for Outlook 2010 under Windows 7. I've gone into Options -> Trust Center (see below) to try and set it up but when I attempt to select the signing certificate I get an error message: "No certificate available".

How do you create a self-signed certificate for signing emails?

Trust Center


No Certificate Error

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2 Answers

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If you don't need it to be signed by an internal CA or public CA, then you can run the program C:\Program Files (x86)\Microsoft Office\Office14\SELFCERT.EXE, which will generated a self-signed certificate.

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I did try that but got a strange error message: "An error occurred during certificate creation". Any ideas? i.imgur.com/IN6rz.png – Luke Quinane Feb 16 '12 at 23:33
I was able to create a certificate, but was unable to add it and received the same No Certificate Error message that @Luke has. – jidar Feb 17 '12 at 2:49
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I had this same issue and I run the CA for our system. MS CA for Windows 2008 R2.

I issued a valid email certificate and it still did not work. The signing certificate would not show but the encryption certificate did show.

I finally figured out that when you request the certificate you MUST select "Mark keys as exportable."

As soon as I did that, everything worked automatically.

Hope that helps.

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