First, start the HTTP Administration server on your i.
1. Start Operations Navigator
2. Open Network > Servers > TCPIP
3. Select “HTTP Administration” (It’s at or near the bottom of the list)
4. Click the Start button
Once the server has started,
Open Internet Explorer and enter http://your.i5.ip.address:2001/
Login to the i5/OS Tasks manager
Click on Digital Certificate Manager
Select a Certificate Store, click Continue and enter the store password
Expand the Fast Path menu on the left
Click on Work with CA Certificates
Check if your CA is listed and enabled. I believe yours is from RSA?
If not listed, click on Import at the bottom to add
Enable the CA then Validate