UW Digital ID (Win) - Outlook 2007 & 2010 An error occurred in the underlying security system.
In this scenario, the following error message will be displayed.
The above error message occurs if there is not a digital certificate available for the sender or recipient on your workstation.
Outlook cannnot send a signed or encrypted or in some instances view an S/MIME message.
As a workaround, you can use the following instructions to manage certificates for Outlook 2007 and 2010.
- Open a digitally signed message from the recipient.
- Right-click on the name in the "From:" box and choose "Add to Outlook Contacts"
- The contacts window will open next click on the "Save & Close" button in the upper-left corner.
- Verify this setting in Outlook:UW Digital ID (Win) - Outlook 2007, 2010, and 2013 - Messages Display as Encrypted when they are only Signed
For more information see: Outlook Add a recipient's certificate to your contacts