Magento admin has a logging module that records actions performed in Magento admin. It is a very useful module when the admin is used by multiple persons and you want to track the changes made in admin. You have the option to select which of the admin actions are logged. To select/modify the admin actions to be logged go to Admin >> System >> Configuration >> Advanced >> Admin, check the checkbox next to any actions that you want to be logged in the log file.

The admin action log report can be viewed by going to Admin >> System >> Admin Actions Log >> Report

When we edit billing/shipping address of an order in admin, “Admin Actions Log” does not record it. To maintain order address edit logs we need to override the Enterprise logger module /app/code/core/Enterprise/Logging/etc/logging/xml file.

We need to add the following xml tag

<adminhtml_sales_order_addressSave>
<action>save</action>
<expected_models extends="merge">
<sales__order_address/>
</expected_models>
</adminhtml_sales_order_addressSave>

The above tag can be added below

<adminhtml_sales_order_edit_save></adminhtml_sales_order_edit_save>