I have a client that is using self-signed certificates (to sign InfoPath forms). The certificates are created using the certificate service built into Windows 2008. They said the certicates always expire after one year. How does one chage the expiration date on a certificate or do they have to issue new ones? (Is one year the default in the template)?
I think the only tools available to them are the ones windows comes with: certmgr, certutil, & certreq. (Am I missing any?)
Also, The certificate is a Code Signing Certificate, if that makes a difference?