STEP ONE
Connect your CAC reader to your IPhone or IPad. If your IOS device has a lightning port you will need to buy an adapter like the one I am holding In the photo. Then you can connect your USB CAC reader Into the adapter.
If you have a newer IOS device that has a USB-C port, then you can simply plug In your USB-C CAC reader. However, If your CAC reader is a traditional USB, you will need to buy a similar adapter for your USB-C device. I have provided links below for these adapters.
STEP TWO
Wait for your IOS device to update the software for your CAC reader and adapter.
STEP THREE
Go to https://webmail.apps.mil/ for AIR FORCE and ARMY.
Some ARMY members may need to go to https://web.mail.mil
STEP FOUR
Click on "Sign In with CAC/PIV"
STEP FIVE
Click on your name. It will appear where mine Is blurred out.
STEP SIX
Type In your 6 digit pin
STEP SEVEN
Start checking your email. Here Is how It will look on your IPad.
Here Is how It will look on your IPhone
I have an older IPad that has a lighting port, so this Is how my setup looked.
TIPS:
Works a lot better on Safari. I had Issues with Chrome on the IPad.
Links to USB adapters below