Exchange iapp and AirWatch

You can deploy the iApp, then remove the strict updates. Go to the iApp properties, make sure you have advance view selected, and disable the checkbox. After that, you can change anything in the configuration for that iApp, including add the AirWatch config.

You just need to understand that when doing that, you should keep notes about the changes you have done. Because when you apply a new version of the iApp, or use the reconfigure option, your changes will be gone and you have to configure again.