Add Or Import Certificate Into Contacts. Choose one of the following to specify how you want Outlook to handle duplicate contacts. 2010 when you received an SMIME signed certificate from an external party you could right click on their name in the message and select Add to Outlook Contacts.
On the right click on Import and select the file you just created. Open the MMC Start Run MMC. In the Trust Center dialog box click the E-mail Security in the left bar.
Once thats imported you can highlight the new one and click on Set as Default.
Click on GenerateImport. In previous versions of Outlook eg. Right-click on the Return Address. In the Trust Center dialog box click the E-mail Security in the left bar.
