After upgrading from ARS 6.5 to ARS 6.7(+ patch 3597) the 'Default Mail Settings' object appears to have all dialog boxes blank. The mail settings still perform as expected from prior to upgrade and the edsaRuleDefinition attribute has the correct data stored. When attempting to fill in the correct values in the 'Default Mail Settings' object then clicking apply, the following error is displayed.
"Failed to modify the object 'CN=Default Mail
Configuration,CN=Configuration'.Administrative Policy returned an error.
Object reference not set to an instance of an object."
Create a new Email Policy and use if required.
The current "Default Mail Policy" will continue to work.