Apple

Step 1. Navigate to your PKI page URL using Safari

Step 2. Click your RootCA certificate (RootExample.cer for instance) to download the file

Step 3. There will be a prompt “This website is trying to download a configuration profile. Do you want to allow this?”, select Allow

Step 4. A notification will display confirming the profile has been downloaded, select Close

Step 5. Open Settings and select the option “Profile Downloaded”

Step 6. Confirm the value in the field “Signed by” matches the certificate you selected earlier, click Install

Step 7. At the warning page, click install

Step 8. At the warning page, click install

Step 9. Settings > General > About > Certificate Trust Settings , toggle on the entry for cer, at the prompt “Root Certificate” select Continue

1. Repeat steps 1-8 again, selecting your issuing CA certificate (IssuerExample.cer for instance) during step 2 – maybe spell them out though.

The CA chain is now installed and trusted.

Android

Step 1. Navigate to the PKI page URL using any browser you like

Step 2. Click your RootCA certificate (RootExample.cer for instance)and your issuing CA certificate (IssuerExample.cer for instance)  to download the respective certificates

Step 4. At the warning select install anyway, and supply the required credentials to verify it’s you

Step 5. Select your RootCA certificate (RootExample.cer for instance)from the recent files

Step 6. Repeat steps 3-5, selecting your issuing CA certificate (IssuerExample.cer for instance) at step 5

The CA chain is now installed and trusted