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Solution ID : SO17194

Last Modified : 06/21/2018

How to enable S/MIME digital signature in Microsoft Office Outlook 2007

Solution

OPTION 1 - Enable Microsoft Office Outlook 2007 to digitally sign all e-mails by default

  1. In Outlook, click on Tools > Trust Center > E-mail Security
  2. Select: Add digital signature to outgoing messages
  3. Next to Default Setting, select the correct certificates (signing and encryption, this may be the same certificate or two separate related certificates) for the default profile.
  4. Click on OK.
     
The sign and encrypt icons will now show up in new emails and they will be signed by default.
 
 
OPTION 2 - Enable Microsoft Office Outlook 2007 to digitally sign a specific e-mail with a specific certificate
 
  1. Launch a new e-mail.
  2. Click on the Options tab.
  3. Click on the arrow to the right of More Options.
  4. Click on Security Settings...
  5. Click on Add digital signature to this message
  6. Click on Change Settings
  7. Next to Signing Certificate, click on Choose and select the new Symantec certificate.
  8. Next to Encryption Certificate, click on Choose and select the new Symantec certificate.
  9. Click on OK and OK again.
  10. Click on Close.
     
 
 
Related solutions:
  • See solution SO12046 for instructions on configuring Outlook 2000 and 2003 to use a certificate by default.
  • See solution SO10780 for instructions on exporting a certificate from Outlook 2000, 2003 and 2007.