Once Files Advanced is being actively managed by AppConnect, any changes to the applicable Container Policy will be received by the Files Advanced mobile when it checks in with the Mobile@Work app on its device. The interval at which this check in occurs is set on your MobileIron VSP and will cause the Files Advanced app to temporarily switch over to the Mobile@Work app to perform the check. This will interrupt the user, so it's recommended that this check-in interval be made long enough to not frequently interfere with their use of the app.
Any changes to Container Policy, revocation of access to Files Advanced, etc, will be applied to the app at the next time it checks in.