I am using a certificate in Outlook to encrypt and sign messages. Everything work great. My certificate is going to expire next year. The following is unclear to me:
Should I get a new certificate, or is there a way to renew my current certificate?
When I have the new/renewed certificate, do I have to tell all the people I'm communicating with that I have a new/renewed certificate?
What will happen if someone sends me an E-Mail, using my old public key, and I have the new/renewd certificate installed in Outlook.