We used email address in general data of customer master to send out customer's ebilling document thus it is a very important field for us. However, we found that there is no change history for this field if we run transaction OV51.
Also no change history in the fax/email of contact person which will cause confuse.
Do you know whether there is a configuration to put a field into the change history of customer master data? Development will only be our last choice.