Before you install an email certificate

Make sure you request and download your S/MIME certificate first. Learn more about how to request and download a GlobalSign S/MIME certificate. 

How to install an email certificate

1. Navigate to the folder where your downloaded certificate is stored. Click on the file to open. 
   Image Modified

2. Enter your certificate password. Click OK. 
   

3. Your certificate will now be added under My Certificates in the Keychain Access window.
   Image Modified
   

4. In Outlook, go to Outlook > Preferences. 
   

   Image Modified

   
   

5. Click on Accounts, then click Advanced. 
   

   Image Modified

   
   

   Image Modified

   
   

6. Click on the Security tab. Under the Digital signing, Encryption, and Certificate authentication headings, select your certificate from the Certificate drop-down menu(s). If desired, you can select any or all of the following checkboxes below. Click OK when done.

   1. Sign outgoing messages -Adds your digital signature to all outgoing messages. This checkbox is selected by default.

   2. Send digitally signed messages as clear text - Allows recipients who do not have S/MIME security to be able to read your encrypted message. This checkbox is selected by default.

   3. Include my certificates in signed messages - Allows recipients to be able to send encrypted messages to you. This checkbox is selected by default.

   4. Encrypt outgoing messages - Encrypts all outgoing messages.
      

      1. Note: You cannot send encrypted emails to individuals who do not have their digital signature activated. 
         
         

         Image Modified

         
         
         

7. To encrypt an email message individually:

...