Automatically select a client certificate in a mobile device

Don't know if this is still an issue for you but if you bake the client certificate and the F5 VPN configuration into the Airwatch iOS profile then you don't get the prompt. This has worked for me since AW 6.3. We are currently on AW 7.3 HF7 and still working with no issues. If you need more info let me know.

Also might be worth looking at "Advertised Certificate Authorities" in the client ssl profile under Client Authentication (FTI I am on 11.5.1). Not tried it myself so cannot verify if it will work or not but worth investigating.