Your certificate should already be selected for signing and encryption by default. Step 11: Click the OK button displayed in the security dialog box.Īt this point, you return to the Email Security panel in the Trust Center window. Step 10: Enter the password associated with the certificate file and then click OK. Step 9: Find and select the downloaded file. Step 8: Click the Browse button displayed next to Import File. Step 7: Check the box next to Import Existing Digital ID from a File if it’s not already.

Step 6: Under Digital IDs (Certificates), click on the Import/Export button. Step 5: Select Email Security listed on the left. Step 4: Click on the Trust Center Settings button displayed on the right. Step 3: On the Outlook Options window, select Trust Center listed on the left. Step 2: Select Options on the next panel. Step 1: With the Outlook desktop client open, click File located in the top left corner.

These instructions assume that you already obtained an S/MIME certificate, downloaded the file to your Windows PC, and have the required password handy.

Encrypt email attachment for mac