You may also check the certification expiry date from Java using Internet Browser

  1. Open url
  2. If fails try       (5 is fixed, 01 is your instance number and 00 is the port)
  3. Enter user j2ee_admin or any id which you have authorization to access the portal
  4. Click "I Agree" if you see this error. If not, then you may continue scrolling down to check your expiry date:

  5. The expiry date