Be aware the wipe on 10 attempts isn't an exchange policy. Some exchange policies can force a PIN or a password, but thats it.

HTC, as of recently on their devices, has mandated the wipe on 10 policy once any type of security is set (whether that is a PIN or a pattern or a password) regardless of exchange policy.

Whether its because of exchange or your own setting, any security lock enabled on the phone will trigger the wipe on 10 policy.