You should receive an expiration notice from email@example.com 30 days prior to your certificate expiration. Upon receipt of the email notice, follow the instructions in How to: Request a personal digital certificate for signing and encrypting emails.
TechMail administrators will initiate an invitation to be sent to you. You will receive an invitation at your TechMail address from firstname.lastname@example.org with instructions for downloading your certificate.
For instructions on downloading the certificate, please see How to: Download your digital certificate for signing and encrypting emails. You can then configure your email software to use the certificate.
TIP: If you have email messages which were encrypted to you using a previous certificate, you will need to keep that certificate installed if you wish to be able to read those encrypted messages.