Exchange auto sync only when WiFi, manual otherwise?
 

I would like to have a automatic change on my Exchange sync schedule when I connect/disconnect from WiFi. Like:

WiFi connected: Peak schedule = Every 15 min
WiFi disconnected: Peak schedule = Manual

Or if thats not possible, maybe:
WiFi enabled: Peak schedule = Every 15 min
WiFi disabled: Peak schedule = Manual

Is that possible?

PS. And even better if it's possible to check:
If charging cellphone AND WiFi connected: Peak schedule = Every 15 min
Otherwise Peak schedule = Manual