Renewing for SSL Certificate

Dear Brothers am new in F5 field so I need your urgent support if you want. 1- In my real F5 machine we have Four applications (Live Link, SharePoint, Exchange and Portal), I need to renew the certificate for these applications. (very urgent because the old certificates already expired). 2- I added one new application as internal and in DMZ site, it is working fine but is showing unknown with blue color, how I can make it green.

Appreciate your kind support. Thanks,,