Using the necessary functiions for MAPI in Dexterity an error occurs which is baffling. The exact same system running on different computers (clustomers) will get an error that says "Address couldn't be added to address list". It work on 98% of our customers, but the other 2% get this error -- exact same system for all written in Dexterity. Is there a setting that a customer is missing? Should the address list be destroyed before using MAPI commands to "add addresses"? If you have any idea or leads please respond. Thank you.